ScrumBut: Failure to Deliver

本文探讨了Scrum团队中未能履行冲刺承诺的问题,并分析了这种现象背后的原因。作者认为偶尔错过承诺是可以接受的,但长期模式化的失败则不可接受。文章强调了承诺的重要性,并提供了改进团队行为的方法。

I'm frequently disturbed by the ease with which ScrumBut teams allow unfinished features to slide from one sprint into the next, creating a pattern of failure in meeting their sprint commitments—a pattern that the team considers acceptable. In these environments, it is normal to overhear quotes such as "Don't worry about it. We'll just finish it up in the next sprint," and "It's no big deal. We always have two or three stories that we don't finish." As Temple Grandin would say, "Bad is the new normal."

The failure to meet commitments should not be considered acceptable. If your Scrum team is doing this, please reconsider.

When I teach Scrum, I tell the new teams two things: 

  

  1. It is OK not to meet your sprint commitment.
  2. It is NOT OK not to meet your sprint commitment.


They are both true statements. The following F. Scott Fitzgerald quote explains the importance of the dichotomy: "The test of a first-rate intelligence is the ability to hold two opposed ideas in mind at the same time and still retain the ability to function. One should, for example, be able to see that things are hopeless and yet be determined to make them otherwise."

It is OK to fail to meet your commitment when the team is new, or if unforeseen problems prevent getting to done, or if external issues like layoffs or natural disasters cause a slowdown. Every team—even a seasoned one—will miss meeting its sprint commitment on occasion.

But if the team has been working together for a while and knows how much it can complete on average in a sprint, then it is NOT OK to establish a pattern of not keeping your promise. A commitment is a promise. In Scrum, committing to a sprint is a promise to do the best you can to deliver what the team collectively said it would deliver in that sprint. If the Scrum team takes a lackadaisical attitude toward its sprint commitment, it means either that team members don't understand the meaning of the commitment or that the meaning has been altered to mean something else entirely. If it means something else, the team has moved away from the Scrum framework and values and into ScrumBut territory.

This ScrumBut practice is often indicative of the corporate culture. For some organizations, letting things slide and not keeping promises is simply in keeping with company values. Does that make the slippage OK? Absolutely not. It does speak to an organizational issue that should be addressed, which is one of the things that Scrum does so well: It makes problems highly visible very quickly, so that they can be resolved. If the corporate culture is accepting of this lackadaisical "We suck less" paradigm that tends to breed ScrumBut teams, then its leadership and vision should be questioned.

Regardless of the company's culture, teams should think of their sense of personal integrity and pride in delivery to overcome this ScrumBut practice. The sprint retrospective is a good place for the team to address this.

Remember that the ultimate determination of whether or not failure to meet sprint commitments is acceptable behavior is up to the team. The ScrumMaster can force neither a team nor individuals to adopt a set of values that drive their behaviors. The team must want to make this change on its own. It takes a confident ScrumMaster to hold up a mirror to the team and be willing to ask the questions that will make the team consider its actions and the ramifications. Asking the team, "Is it OK for us to make a promise and then break it?" undoubtedly will make the team feel uncomfortable, but it is a fair question.

The ScrumMaster also may want to make sure that the team is aware of the five values of Scrum: Commitment, Openness, Focus, Respect, and Courage. You can try an exercise with the team using the template "We believe in (value), therefore we will (do something)." Ask the team members to brainstorm on what they believe in and what they plan to do about it. An example outcome from one team might be "We believe in Respect, therefore we will not raise our voices in anger but instead will discuss our differing viewpoints calmly and with open minds." Or, for this particular ScrumBut issue, a team may come up with "We believe in Commitment, therefore we will do whatever it takes to deliver on our promises to the business and to our customers." Using the five Scrum values as a starting point, the ScrumMaster can lead the team in the creation of a set of team working agreements, or value statements, that will drive its behaviors. The team creates these, and the ScrumMaster facilitates the discussion.

Later, if the team reverts to old habits and once again takes a laid-back approach to Commitment, the ScrumMaster can simply ask the team, "Is this in keeping with our working agreement on Commitment?" Part of the ScrumMaster's job is to remind the team of the decisions it made.

Don't accept persistent failures to meet sprint commitments. Question why and how the team came to accept this behavior as normal, and together make a real commitment to change for the better.

本项目采用C++编程语言结合ROS框架构建了完整的双机械臂控制系统,实现了Gazebo仿真环境下的协同运动模拟,并完成了两台实体UR10工业机器人的联动控制。该毕业设计在答辩环节获得98分的优异成绩,所有程序代码均通过系统性调试验证,保证可直接部署运行。 系统架构包含三个核心模块:基于ROS通信架构的双臂协调控制器、Gazebo物理引擎下的动力学仿真环境、以及真实UR10机器人的硬件接口层。在仿真验证阶段,开发了双臂碰撞检测算法和轨迹规划模块,通过ROS控制包实现了末端执行器的同步轨迹跟踪。硬件集成方面,建立了基于TCP/IP协议的实时通信链路,解决了双机数据同步和运动指令分发等关键技术问题。 本资源适用于自动化、机械电子、人工智能等专业方向的课程实践,可作为高年级课程设计、毕业课题的重要参考案例。系统采用模块化设计理念,控制核心与硬件接口分离架构便于功能扩展,具备工程实践能力的学习者可在现有框架基础上进行二次开发,例如集成视觉感知模块或优化运动规划算法。 项目文档详细记录了环境配置流程、参数调试方法和实验验证数据,特别说明了双机协同作业时的时序同步解决方案。所有功能模块均提供完整的API接口说明,便于使用者快速理解系统架构并进行定制化修改。 资源来源于网络分享,仅用于学习交流使用,请勿用于商业,如有侵权请联系我删除!
评论
成就一亿技术人!
拼手气红包6.0元
还能输入1000个字符
 
红包 添加红包
表情包 插入表情
 条评论被折叠 查看
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值