阅读说明：本技术 一种基于wbs的航空发动机研发计划编制方法 (WBS-based aeroengine research and development planning method ) 是由 赵娜 于海顺 王相平 隋岩峰 王宏伟 赵明 黄涛 于 2019-09-26 设计创作，主要内容包括：本申请属于航空发动机研发计划编制方法技术领域,特别涉及一种基于WBS的航空发动机研发计划编制方法,包括如下步骤：对航空发动机的物理结构进行分解；确定航空发动机工作分解结构中的单元层级结构；分解出WBS工作包；将不同类型的WBS工作进一步分解,得到WBS一级技术活动,作为步骤三中对应的WBS工作包的下一层级；建立呈层级关系的航空发动机研发计划；建立航空发动机工作分解结构与航空发动机研发计划之间层级映射关系。本申请的基于WBS的航空发动机研发计划编制方法,实现了工作分解结构(WBS)转航空发动机研发计划的可行性和实用性；同时,提高了计划编制的完整性、准确性、可控性、可执行性和可考核性。(The application belongs to the technical field of aero-engine research and development planning methods, and particularly relates to an aero-engine research and development planning method based on WBS, which comprises the following steps: decomposing the physical structure of the aircraft engine; determining a unit hierarchical structure in an aircraft engine work breakdown structure; decomposing a WBS work package; further decomposing the WBS works of different types to obtain WBS primary technical activities as the next level of the corresponding WBS work packages in the third step; establishing an aero-engine research and development plan in a hierarchical relationship; and establishing a hierarchical mapping relation between the aero-engine work decomposition structure and the aero-engine research and development plan. The aircraft engine research and development plan compiling method based on the WBS realizes feasibility and practicability of a Work Breakdown Structure (WBS) to-aircraft engine research and development plan; meanwhile, the completeness, accuracy, controllability, performability and accountability of planning are improved.)

1. A research and development planning method for an aircraft engine based on WBS is characterized by comprising the following steps:

decomposing the physical structure of the aircraft engine according to the hierarchical relationship from the whole to the components;

determining a unit hierarchy structure in an aero-engine work decomposition structure according to the hierarchy relation of the physical structure of the aero-engine, wherein the unit hierarchy in the aero-engine work decomposition structure corresponds to the hierarchy of the physical structure of the aero-engine one by one;

step three, decomposing a WBS work package from the level of the physical structure of the aircraft engine in the step one, and taking the WBS work package as the next level after the unit level structure in the step two;

step four, further decomposing the WBS work packages of different types according to the stages or steps of development to obtain WBS first-level technical activities as the next level of the WBS work packages corresponding to the step three;

establishing an aero-engine research and development plan in a hierarchical relationship according to a management hierarchical mode of the aero-engine research and development plan;

and step six, establishing a hierarchical mapping relation between the aero-engine work decomposition structure obtained in the step one to the step four and the aero-engine research and development plan obtained in the step five.

2. The WBS-based aircraft engine development planning method according to claim 1, wherein in the first step, the physical structure of the aircraft engine is decomposed into three layers, namely, a complete engine layer, a component or system layer, and a component layer.

3. The WBS-based aircraft engine development planning method of claim 2, wherein said component or system layer comprises at least one of a fan, an air intake casing, a high pressure compressor, a main combustor, a high pressure turbine, a low pressure turbine, a jet nozzle, a mechanical system, a control system;

the component layer comprises components or components and parts under the system layer.

4. The WBS-based aircraft engine development planning method according to claim 2, wherein in the second step, the unit hierarchy structure in the aircraft engine work breakdown structure includes a WBS unit first stage, a WBS unit second stage, and a WBS unit third stage, wherein

The first stage of the WBS unit corresponds to the complete machine layer, the second stage of the WBS unit corresponds to the component or system layer, and the third stage of the WBS unit corresponds to the component layer.

5. The WBS-based aircraft engine development planning method of claim 4, wherein in the third step, the WBS work package is classified into a design class, a manufacturing class, an assembly class, and a verification class according to the nature of different works.

6. The WBS-based aircraft engine development planning method of claim 1, further comprising, after said step four, and between said step five:

step 4.1, according to the flow or step of the WBS primary technical activity, further decomposing the WBS primary technical activity to obtain a WBS secondary technical activity which is used as the next level of the corresponding WBS primary technical activity;

and 4.2, according to the decomposition flow in the step 4.1, decomposing the WBS secondary technical activities and other levels of technical activities sequentially obtained subsequently one by one until the work of the research and development of the aero-engine is decomposed to the work carried over by a single department.

7. The WBS-based aircraft engine development planning method of claim 6, wherein in said step five, the aircraft engine development plan is divided into three levels, wherein

The first-level plan is a higher-level assessment plan accepted by the research institution level;

the second-level plan is a plan jointly borne by scientific research departments in the research institutions;

the three-level plan is a plan independently undertaken by a single scientific research department in a research institution.

8. The WBS-based aircraft engine development planning method according to claim 7, wherein in the sixth step, the correspondence rule of the hierarchical mapping between the aircraft engine work breakdown structure and the aircraft engine development plan is:

and determining according to the actual accepting departments of all levels of technical activities in the WBS until the sub-level technical activities are accepted by a single department and correspond to the three-level plan.

9. The WBS-based aircraft engine development planning method of claim 7, further comprising:

and seventhly, decomposing the research and development target nodes of the aero-engine, determining the extracted secondary plan and the research and development nodes of the tertiary plan step by step, and finally finishing planning.

Technical Field

The application belongs to the technical field of aero-engine research and development planning methods, and particularly relates to a method for compiling an aero-engine research and development plan based on a Work Breakdown Structure (WBS).

Background

Plan management is an important management content in the field of project management, and how to scientifically and reasonably compile scientific research plans is a problem and a difficult problem which is always concerned by scientific research institutions. In order to improve the compilation quality of a research and development plan in the field of aero-engines as soon as possible and solve various problems in the compilation of the research and development plan of the aero-engines, a project of plan management and research is specially set up in an important project of ' basis and application research of an autonomous research and development system of the aero-engines ' and a gas turbine ', and the research are mainly carried out on how to compile the research and development plan of the aero-engines based on a Work Breakdown Structure (WBS).

The Work Breakdown Structure (WBS) is a system that is centered on a product (aero-engine) and is composed of product (hardware, software) items, service items, data items and other contents reflecting the results of the project, and is an important component of the research and development of the product (aero-engine). It establishes the work scope of the project and reflects the product (aeroengine) to be developed and the relation between the work tasks and the final product. The WBS is a basis for planning product (aeroengine) research and development projects, is complete and reasonable, has proper granularity, is suitable for research institute application characteristics, and has important significance for solving the problems of incomplete research and development projects of aeroengine projects, unclear responsibility and division, unclear measurement and assessment and the like.

At present, the research on how to compile an aircraft engine development plan based on a Work Breakdown Structure (WBS) in domestic and foreign documents is very little, and only a methodology research on how to compile a Work Breakdown Structure (WBS) is needed, and a method for converting the WBS into a plan is lacked, and the actual planning work cannot be effectively guided. In recent years, research on how to compile a research and development plan based on a Work Breakdown Structure (WBS) has been conducted in each of the aviation engine research institutes, and no effective guidance method for effectively associating the Work Breakdown Structure (WBS) with the research and development plan has been proposed, and the practical requirements for quality improvement of the compilation of the research and development plan of the aviation engine cannot be met.

The problems in the aspect of development and planning of aero-engines, which always plague the aero-engine institute, mainly include:

one is incomplete planning. Most of the existing conventional plans are planning modes based on historical experience, the planning modes are often dependent on development experience and technical level of a builder, and the omission of the plans often exists, so that the planning is incomplete.

Secondly, the demand decomposition is not sufficient. After a project is established, research and development work cannot be systematically combed from requirement decomposition according to a forward design thinking, so that a whole task list of the project cannot be formed, planning cannot be completely based on the research and development requirements, the completeness of the research and development work cannot be guaranteed, the completion of the research and development work can not be guaranteed, the completion of the missed work can be frequently found, and the project schedule is easily impacted.

Thirdly, the development process is not controlled. Planning lacks the overall arrangement of project research and development work, can not reasonably distribute and balance work tasks of each year, and research and development work lacks process planning, so that the research and development planning is unreasonable and the research and development progress is not controlled. Meanwhile, the resources required by the plan are not sufficiently analyzed, so that the resource allocation is not in place, and the progress of the scientific research plan is delayed.

Fourth, the planning subject responsibility is unclear. The work interface between plans is not clear, partial plans cannot be decomposed into single responsibility units, so that responsibility bodies are disordered, the plans cannot be executed according to requirements, and problems are mutually pushed away.

Fifthly, the difficulty of plan examination and measurement is high. The plan lacks clear completion standards (deliveries), whether the plan is completed or not can not be measured, and the occurrence of problems can not define responsibility, so that the difficulty of plan assessment and measurement is high.

Based on the above planning problems, how to plan the development of an aircraft engine based on a Work Breakdown Structure (WBS) has been a subject of research pursued by the research institute of aircraft engines, and how to efficiently and rationally convert WBS into a plan has been a problem.

There are mainly the following problems: firstly, how to extract a research and development work plan from a Work Breakdown Structure (WBS) with a complex structure and a hierarchical relationship, and how to match and correspond the Work Breakdown Structure (WBS) with the research and development plan; secondly, how to ensure the completeness of the research and development plan of the aeroengine; thirdly, how to better configure resources and schedule, so that the research and development process of the aero-engine is in a controlled state; fourthly, how to scientifically and reasonably determine the research and development plan responsibility main body; and fifthly, how to clearly develop the completion standard (delivery) of the activity.

Disclosure of Invention

In order to solve at least one of the above technical problems, the present application provides a WBS-based aircraft engine development planning method.

The application discloses an aircraft engine research and development planning method based on WBS, which comprises the following steps:

decomposing the physical structure of the aircraft engine according to the hierarchical relationship from the whole to the components;

determining a unit hierarchy structure in an aero-engine work decomposition structure according to the hierarchy relation of the physical structure of the aero-engine, wherein the unit hierarchy in the aero-engine work decomposition structure corresponds to the hierarchy of the physical structure of the aero-engine one by one;

step three, decomposing a WBS work package from the level of the physical structure of the aircraft engine in the step one, and taking the WBS work package as the next level after the unit level structure in the step two;

step four, further decomposing the WBS work packages of different types according to the stages or steps of development to obtain WBS first-level technical activities as the next level of the WBS work packages corresponding to the step three;

establishing an aero-engine research and development plan in a hierarchical relationship according to a management hierarchical mode of the aero-engine research and development plan;

and step six, establishing a hierarchical mapping relation between the aero-engine work decomposition structure obtained in the step one to the step four and the aero-engine research and development plan obtained in the step five.

According to at least one embodiment of the present application, in the first step, the physical structure of the aircraft engine is decomposed into three layers of architectures, namely, a complete engine layer, a component or system layer and a component layer.

According to at least one embodiment of the present application, the component or system layer comprises at least one of a fan, an air inlet casing, a high pressure compressor, a main combustion chamber, a high pressure turbine, a low pressure turbine, a tail nozzle, a mechanical system, a control system;

the component layer comprises components or components and parts under the system layer.

In accordance with at least one embodiment of the present application, in the second step, the cell hierarchy structure in the aircraft engine work breakdown structure includes a WBS cell first stage, a WBS cell second stage, and a WBS cell third stage, wherein

The first stage of the WBS unit corresponds to the complete machine layer, the second stage of the WBS unit corresponds to the component or system layer, and the third stage of the WBS unit corresponds to the component layer.

In the third step, according to at least one embodiment of the present application, the WBS work packages are classified into a design class, a manufacturing class, an assembly class, and a verification class according to the nature of different works.

According to at least one embodiment of the present application, after the step four, the method further includes, between the step five:

step 4.1, according to the flow or step of the WBS primary technical activity, further decomposing the WBS primary technical activity to obtain a WBS secondary technical activity which is used as the next level of the corresponding WBS primary technical activity;

and 4.2, according to the decomposition flow in the step 4.1, decomposing the WBS secondary technical activities and other levels of technical activities sequentially obtained subsequently one by one until the work of the research and development of the aero-engine is decomposed to the work carried over by a single department.

In accordance with at least one embodiment of the present application, in the fifth step, the aircraft engine development plan is divided into three levels, wherein

The first-level plan is a higher-level assessment plan accepted by the research institution level;

the second-level plan is a plan jointly borne by scientific research departments in the research institutions;

the three-level plan is a plan independently undertaken by a single scientific research department in a research institution.

According to at least one embodiment of the application, in the sixth step, the correspondence principle of the hierarchical mapping between the aircraft engine work decomposition structure and the aircraft engine development plan is as follows:

and determining according to the actual accepting departments of all levels of technical activities in the WBS until the sub-level technical activities are accepted by a single department and correspond to the three-level plan.

According to at least one embodiment of the present application, the WBS-based aircraft engine development planning method further comprises:

and seventhly, decomposing the research and development target nodes of the aero-engine, determining the extracted secondary plan and the research and development nodes of the tertiary plan step by step, and finally finishing planning.

The application has at least the following beneficial technical effects:

the aircraft engine research and development plan compiling method based on the WBS realizes feasibility and practicability of a Work Breakdown Structure (WBS) to-aircraft engine research and development plan; meanwhile, compared with the traditional planning method, the completeness, accuracy, controllability, performability and accountability of planning are improved, and the method has a wide application prospect in the field of aircraft engine planning management and has the potential of being popularized to other industries.

Drawings

FIG. 1 is a flow chart of a WBS based aircraft engine development planning method of the present application;

FIG. 2 is a schematic illustration of a Work Breakdown Structure (WBS) hierarchy of an aircraft engine in an embodiment of the present application;

FIG. 3 is a schematic view of a hierarchical structure of an aircraft engine development plan according to an embodiment of the present application

FIG. 4 is a diagram illustrating a mapping relationship for planning based on a Work Breakdown Structure (WBS) in an embodiment of the present application.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In order to realize the establishment of an aircraft engine research and development plan based on a Work Breakdown Structure (WBS), the invention modifies the breakdown hierarchy of the Work Breakdown Structure (WBS) of the aircraft engine and the establishment hierarchy of the aircraft engine research and development plan, and the mapping correspondence between the Work Breakdown Structure (WBS) hierarchy and the planning establishment hierarchy can be realized through the method, thereby realizing the feasibility of establishing the aircraft engine research and development plan based on the Work Breakdown Structure (WBS), and effectively solving the difficulty and the problem of the research and development plan of the Work Breakdown Structure (WBS) in the branch of the department.

Specifically, the WBS-based aircraft engine development planning method of the present application is described in further detail below with reference to fig. 1-4.

The application discloses an aircraft engine research and development planning method based on WBS, which comprises the following steps:

and S101, decomposing the physical structure of the aircraft engine according to the hierarchical relationship from the whole to the components aiming at the top-level research and development requirements of the aircraft engine project.

Specifically, the physical structure of an aircraft engine is decomposed into three layers of architectures, namely a complete engine layer, a component or system layer and a component layer of the engine. The part or system layer comprises at least one of a fan, an air inlet casing, a high-pressure air compressor, a main combustion chamber, a high-pressure turbine, a low-pressure turbine, a tail nozzle, a mechanical system and a control system; the component layer comprises components and parts of each component or system layer, such as a rotor, a stator and a casing component of the high-pressure compressor.

In this step, a Work Breakdown Structure (WBS) of the aircraft engine project in the life cycle may be compiled according to actual work needs, or a Work Breakdown Structure (WBS) of the aircraft engine project at a certain development stage may be compiled.

And S102, determining a unit hierarchical structure in the work decomposition structure of the aero-engine according to the hierarchical relationship of the physical structure of the aero-engine, wherein the unit hierarchical structure in the work decomposition structure of the aero-engine corresponds to the hierarchical structure of the physical structure of the aero-engine one by one.

Specifically, the unit hierarchy structure in the aircraft engine work breakdown structure comprises a WBS unit first stage, a WBS unit second stage and a WBS unit third stage; wherein, the first stage of the WBS unit corresponds to the whole machine layer; the WBS unit second-stage corresponding parts or system layers mainly comprise a fan, an air inlet casing, a high-pressure compressor, a main combustion chamber, a high-pressure turbine, a low-pressure turbine, a tail nozzle, a mechanical system, a control system and the like; the third stage of the WBS unit corresponds to a component layer, namely a rotor, a stator, a casing component and the like under the high-pressure compressor.

And step S103, decomposing a WBS work package from the level of the physical structure of the aircraft engine in the step one to serve as the next level after the unit level structure in the step S102.

Specifically, the WBS level four is a corresponding "WBS work package" decomposed from the first three layers of PBS, and each layer of PBS corresponds to the "WBS work package". The WBS working package mainly aims at the work needing to be carried out, which is formulated by different PBS levels, and can be divided into design type, manufacturing type, assembly type and verification type WBS working packages according to the properties of different works, such as a high-pressure compressor design working package, a high-pressure turbine assembly working package, a high-pressure compressor rotor manufacturing working package and the like, and the work of the level can be used as an independent task unit for sub-packaging or outsourcing.

And step S104, further decomposing the WBS work packages of different types according to the development stages or steps to obtain WBS level technical activities as the next level of the corresponding WBS work packages in the step S103.

Specifically, the WBS fifth level is a work that is further broken down by the development process for different types of WBS work packages, referred to as WBS level technical activity. Different types of work have different complexity and steps, and can be decomposed in stages or in steps according to the working characteristics of the work. For example, a high-pressure compressor design work package can be decomposed into four primary technical activities of feasibility analysis, scheme design, technical design and detailed design.

Further, step S104 may be followed by step 4.1, step 4.2;

and 4.1, further decomposing the WBS primary technical activity according to the flow or the step of the WBS primary technical activity to obtain WBS secondary technical activity which is used as the next level of the corresponding WBS primary technical activity, namely the WBS sixth level.

The WBS sixth level is a second-level technical activity that continues to be decomposed downward according to the first-level technical activity, and the decomposition mode is generally decomposed one by one according to the flow or steps of the first-level technical activity. For example, the scheme design of the high-pressure compressor can be divided into a plurality of secondary technical activities such as pneumatic scheme design, structural scheme design, strength scheme evaluation and the like.

And 4.2, decomposing the WBS secondary technical activities and other levels of technical activities sequentially obtained in the follow-up process one by one according to the decomposition process of the step 4.1 by analogy until the research and development work of the aero-engine is decomposed to the supporting work of a single department.

And S105, establishing an aero-engine research and development plan in a hierarchical relationship according to a management hierarchical mode of the aero-engine research and development plan.

Specifically, most of scientific research management and control modes of the aeroengine scientific research institutions are weak matrix type management modes which are mainly characterized by partial function type organization structures, and project plans are directly issued to scientific research departments to be executed. Based on the scientific research management and control mode, the research and development plan of the aero-engine is divided into three levels. Wherein: the primary plan is a superior assessment plan accepted by the research institution level, the primary plan is made based on annual research and development targets of the aero-engine, and the responsibility subject is the research institution. The second-level plan is a plan jointly borne by scientific research departments in the research institutions, and is obtained by decomposing downwards based on the first-level plan, and the responsibility main body is a cross-department joint team and is taken by the second-level plan main responsibility department. The three-level plan is a plan independently borne by a single scientific research department in a research institution and is obtained by decomposing downwards based on the two-level plan, and the responsibility main body is the single scientific research department.

And S106, establishing a hierarchical mapping relation between the aero-engine work decomposition structure obtained in the step S101 to the step S104 and the aero-engine research and development plan obtained in the step five.

The corresponding principle of the Work Breakdown Structure (WBS) and the development plan is: the secondary plan corresponds to the content of technical activities taken over by a cross-department joint team in a Work Breakdown Structure (WBS), and generally corresponds to WBS primary technical activities. The third-level plan corresponds to the technical activity content carried by a single scientific research department in a Work Breakdown Structure (WBS), and generally corresponds to the WBS second-level technical activity.

The specific corresponding relation is determined according to the actual carrying departments of the technical activities at all levels in the WBS, if the second-level technical activities of the downward decomposition of the first-level technical activities corresponding to the second-level plan are still carried by the cross-department combined team, the second-level technical activities still correspond to the second-level plan, and so on until the sub-level technical activities are carried by a single department and correspond to the third-level plan, the condition that all the multiple levels are the second-level plan can exist.

The primary plan refers to a higher-level institution examination plan accepted by the research institution, and more means the significance in management, so that the primary plan is extracted from the secondary plan when the research and development plan is extracted based on the Work Breakdown Structure (WBS), and if the extracted secondary plan is the higher-level institution examination plan accepted by the research institution, the plan attribute is adjusted to be the primary plan.

Further, the method for planning the development of the aircraft engine based on WBS according to the present application further includes:

and S107, based on the engine to research and develop the target node, the secondary plan principal department takes lead to the organization related department to jointly complete the decomposition of the target node, the extracted secondary plan and the research and development node of the tertiary plan are determined step by step, and the planning is finally completed. The cross-year plan of the aircraft engine project can be compiled according to actual working requirements, and the project plan of a certain year can also be compiled.

In conclusion, the WBS-based aeroengine research and development plan compiling method realizes feasibility and practicability of a Work Breakdown Structure (WBS) transfer aeroengine research and development plan. Meanwhile, compared with the traditional planning method, the completeness, accuracy, controllability, performability and accountability of planning are improved, and the method has a wide application prospect in the field of aircraft engine planning management and has the potential of being popularized to other industries.

Further, the following advantages are provided:

(1) an aircraft engine Work Breakdown Structure (WBS) hierarchy management method, enabling WBS to be mapped with a plan, is the basis for planning based on a Work Breakdown Structure (WBS).

(2) An IPT management mode is integrated into an aero-engine research and development plan hierarchical management method, and hierarchical management and control of a plan and gradual decomposition of plan monitoring responsibility are achieved. Project managers only need to pay attention to the first-level assessment plan, project manager assistants (project vice headquarters/project supervisors) of scientific research institutions only need to monitor the second-level plan, and the third-level plan is monitored by a second-level plan main responsibility department. And the secondary plan chief and responsible department is used as a lead department and is responsible for completing the decomposition of the secondary plan and the setting of the nodes of the tertiary plan by related research and development departments of the lead organization, and is responsible for completing the secondary plan and the tertiary plan. Through planned hierarchical management, the control degree of the plan can be improved, and the responsibility can be resolved step by step and fall to the ground.

(3) The mapping method for compiling the aero-engine research and development plan based on the Work Breakdown Structure (WBS) realizes the feasibility of compiling the plan based on the WBS, solves the problem that the research and development plan cannot be effectively extracted from the Work Breakdown Structure (WBS) in the past, and also effectively solves the problems that the compilation of the engine research and development plan is incomplete, inaccurate, poor in performability, poor in accountability and the like. The specific application effect is as follows:

a) the Work Breakdown Structure (WBS) is used for breaking down the whole content of the research and development process of the aircraft engine, the completeness of plan breakdown can be ensured based on the Work Breakdown Structure (WBS) planning, and the accuracy of planning is improved compared with the traditional planning method.

b) The Work Breakdown Structure (WBS) is based on the comprehensive breakdown of the project research and development requirements, and systematically combs all the formed project research and development work contents, so that the butt joint of the plan and the requirements can be ensured, and the plan can cover all the requirement contents of the research and development work.

c) The Work Breakdown Structure (WBS) comprises all work tasks which need to be carried out in each year in the research and development stage of the aero-engine, so that project managers at all levels can conveniently master the completed and undeveloped work content in the model research and development process, and balance of the research and development task arrangement of the engine research and development work in each year is facilitated. Meanwhile, the WBS work description contains resource information required by each technical activity, so that plan resource prediction is more sufficient, overall arrangement of resources is more convenient, and controllability of a research and development process is improved.

c) The planning can be decomposed into single responsibility units based on Work Breakdown Structure (WBS) planning, so that the research and development planning responsibility is clear, and the feasibility of plan execution is improved compared with the traditional planning method.

d) When the Work Breakdown Structure (WBS) is compiled, the input and output information of each research and development work can be clearly broken down, so that the planning content extracted based on the Work Breakdown Structure (WBS) contains complete planning and output information, and compared with the traditional planning method, the method improves the clear and verifiable property of the delivered goods required by planning completion.

e) After an aircraft engine work decomposition structure (WBS) is decomposed clearly at one time, the annual plan compilation can be extracted, the iterative process of annual plan decomposition is omitted, and the human resource investment consumed in the plan compilation process is reduced.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.