What is WBS element?

本文详细介绍了工作分解结构(WBS)的概念、用途及其在项目管理系统(PS)模块中的作用。通过政府修建道路项目的例子,解释了如何将大项目细分为多个WBS元素,并分配不同的活动和网络。进一步阐述了如何使用TCode CJ20N创建项目和WBS元素,以及如何在销售订单中关联WBS元素。最后,说明了PS模块在企业项目实施中的关键角色及成本追踪功能。
1) What is WBS element?
2) What is the Tcode to get to that screen?
3) What is the need and pupose of WBS element?
4) Do we happen to work on Functional module during our implementaion project?
5) In what scenario/situation we will be working on WBS?

WBS is nothing but Work Breakdown Structure. It is mainly used in Project System (PS) module. Tcode : CJ20N

For any project defined we must have atleast one WBS. Within this WBS we can have networks. Networks are nothing but the series of activities. Material are used to perform the activities.

To explain in detail just consider one example:

Govt of india wants to have Roads to be build through out the india. So Project can be defined in sap as "Connectivity".

WBS can be roads within different states like Roads for Gujarat, Karnataka etc.. i.e. WBS Gujarat, WBS Karnataka etc.

We can define different networks for these WBS  like Road Between Ahmedabad to Surat or Between Bangalore to Belgham.

For this network we can have many activities like Land selection, Land Preparation, Road Building, Final finishing etc etc.
 

Hemal's example was a good example. Project Systems comes into play only when the industry's business is based on projects like... Construction companies, Engineer to Order scenarios. You may not see anyone using PS module for retail business. As Hemal explained in that example, you have a main project which is broken down into WBS elements. You can use the TC CJ20N to create the project and the WBS elements. Each WBS may have mutiple Networks associated and each Network may have multiple Network Activities as explained in the example by Hemal.
   
On the Sales Order, if your client is implementing PS module, you may have to attach the Sales Order to the WBS element it belongs to. WBS element is nothing but a bucket where all the activities belonging to that particular part of the project are captured. In the example, WBS Gujurat will tell you how many Sales Orders were created for the Gujurat sector, howmuch was spent on raw materials, what's the currect stock ([roject stock) available. How many Production Orders have been confirmed and howmany of them are getting confrmed in the future. How many invoices have been generated or how much revenue has been generated for that particular sector. How many deliveries have been made, what deliverables are still not accomplished. 
   
So as you can see, PS is the center stage for all the modules that are being implemented like FI/CO, SD, MM, PP in this example. You can have cost centers and work centers defined. You can also have profit centers assigned at the plant level and get reports on varius selection criteria. 
   
In a complete cycle of PS, like in reality, you initiate a project, you confirm/release the WBS/activities as per requirement, you execute the project and you close it. 
   
One cannot initiate an activity unless it has been released by the project manager. Everything is accountable here and every dime is counted and at the end you know howmuch did you spend or make on each sector (WBS). Dont get confused with the term sector here... I am using it just for the explaination purposes.
   
In one typical example, the company I was working with until not too long ago, had Deliveries from the Project (TC: CNS0). We never used VL01N. We used CNS0 to create a delivery and then used VL02N for confirming the picking quantity for the already created delivery document.
   
I hope this should help you at least a bit. I'm not a PS consultant so I may not know a whole lot but trying going to CJ20N and you will see a lot yourself. 
   
PS concultants are one of the highest paid consultants. Their supply is less and so is the demand. They are expected to understand real world business processes very well and they are generally the center stage of a project.

Tips by : Hemal, Kunal 
### WBS在项目管理中的定义 WBS(Work Breakdown Structure,工作分解结构)是将项目的总体目标逐步细化为可管理的工作单元的一种层次化结构。它是项目计划的核心工具之一,通过将复杂任务拆解为更小、更易执行的部分,帮助团队清晰地理解项目范围和任务分配[^1]。 ### WBS的作用 1. **明确项目范围** WBS通过将项目目标逐级分解,确保所有工作内容都被涵盖,并且没有遗漏或冗余。这种结构有助于避免“范围蔓延”问题,确保所有团队成员对项目边界有统一的理解[^4]。 2. **支持进度计划制定** 在WBS的基础上,可以进一步安排每个工作包的开始和结束时间,从而构建详细的项目进度计划。这使得项目经理能够更准确地估算工期并跟踪进度。 3. **资源需求规划** 通过WBS,可以识别出每个工作包所需的资源类型和数量,从而为人力资源、设备和材料的调配提供依据。 4. **成本预算编制** WBS是进行成本估算和预算的基础。通过对每个工作包的成本进行估算,并逐层汇总,可以获得整个项目的总成本预算。 5. **风险管理与控制** WBS有助于识别潜在风险点,尤其是在具体工作包层面。它还为变更控制提供了基准,任何超出原定WBS范围的变更都需经过正式审批流程[^1]。 6. **采购计划制定** 如果项目涉及外部采购,WBS可以帮助确定哪些工作需要外包,以及外包的具体内容和要求。 7. **作为项目控制的基准** WBS与范围说明书和WBS字典一起构成“范围基准”,这是项目管理计划的一部分,用于衡量项目绩效并控制变更[^3]。 8. **提升沟通效率** 由于WBS提供了可视化的任务结构,因此有助于团队成员之间更好地沟通和协作,特别是在跨部门或多团队协作的项目中。 9. **支持质量管理和验收标准设定** 每个工作包可以通过WBS字典定义具体的交付成果和验收标准,从而为质量管理提供依据。 ### 示例:简单的WBS结构 ```plaintext 1.0 项目启动 1.1 制定项目章程 1.2 召开启动会议 2.0 需求分析 2.1 收集用户需求 2.2 编写需求规格说明书 3.0 设计阶段 3.1 系统架构设计 3.2 数据库设计 3.3 用户界面设计 4.0 开发实施 4.1 后端开发 4.2 前端开发 4.3 单元测试 5.0 测试阶段 5.1 集成测试 5.2 系统测试 5.3 用户验收测试 6.0 项目交付与收尾 6.1 提交最终交付物 6.2 项目总结会议 ``` ---
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