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Brook's law was coined by Fred Books. It is a claim about the software project management that adding more manpower/resources to a software project makes it even more delayed.This can be applied for Six Sigma projects as well. Ideally when ever we have an additional resource added at the later stage there is a ramp up time where the resource takes time to onboard and understand the sequence of activities that has been carried out for long period and ideally six sigma projects are for a longer duration, there would also be a struggle if there is no domain knowledge because there is a struggle in understanding the progress and also understanding the business nuances. The new added team members also would need to integrate to multiple people who were involved in the project to understand the same end to end. It is also very important that the tasks are divided appropriately, if the same task is done by different people, substantial time and effort is spent on understanding what the other team members are working There is also lot ambiguity since there is an increase in number of communications There would be tasks that cannot be divided and would need longer duration in which case adding additional people would not help In case the project is complex and involves synergies between cross functional teams then it could get tough to manage the timelines There is often a variance in the plan vs what we execute since some of the projects might have more outliers or would need additional analysis or deepdive which we don't foresee when we begin the project Brooks law ideally applies to adding people late in the project however if we have people on- boarded in the beginning of the project with the right skillset to understand from domain perspective that would be helpful. Project plan also should be relooked in case of delays if it is due to an incorrect estimate of the task, in that case correction of the plan is the best way

Brook’s Law Brook’s Law is: “Adding additional resources to a late software development project will make the project later”. Q1. Whether Brook’s Law applies to delayed Lean Six Sigma Projects? Answer: Yes it applies to Lean Six Sigma Projects. Q2. How Brook’s Law applies to delayed Lean Six Sigma Projects? Answer: Brook’s Law can also be applied to dissimilar types of Projects (could be challenging or methodological projects) where highly skilled and experienced workforce are required. There are following reasons which tells how this Law applies. a. Adding new people in existing projects takes more time for them to become productive. And this what has been called “Ramp Up” time as per Brook’s law. The biggest concern of adding new people in existing running project is: it distract the resources who are already working on the project and this distraction results in productivity loss of old resources and at the same time new resources are not yet contributing. Why existing resources becomes less productive? 1. Existing resources are being used to educate the new added people. 2. They have to spare their work so that training can be conducted for new resources. 3. Temporary movement from existing work to training will stop the focus and work on running project. b. Communication overheads increases as the new resource added. Since everybody on this project needs to be in sync in order to make task aligned. So when new resources are added then more discussion, more meeting to be make everybody in sync and they spend more time to understand others work. Brook’s Law in SIX SIGMA Project If we talk about Brook’s Law in SIX sigma project typically in DMAIC approach the here is the answer. Define & Measure Phase: While Brook’s law doesn’t applies on early stage of project so it can be considered that if we add more people during the Define and Measures phase which is considered as early phase where we define problem statement and getting understand then Brook’s law may not be applies. Analyze, Improve & Control Phases: Let’s understand how it’s applied in these three phases, - Analyze - While working for analyzing and validating and selecting the root cause, one has to be aware with the data collection method along with Problem statement. - Improve - Adding people during improve phase will make project delays as in this phase team is already working on testing and implementation phase and new added people needs complete information about the validation and selection of root cause before understand the testing process. - Control – addition on new people in control phase will surely create some delay as existing resource will be distract to make new people understand the whole project. Simulation of Project Delay & Brook’s Law: - - Project Starts: Planned to Complete in 12 months - Month 10: Project manager proposed to add two new resources in the existing project for targeting to complete this project in 12 Months Whereas Engineers has said that they have already completed 70% of Project and 30% of Project will be completed in next two months. - Month 11: Team has informed that it can’t be completed in month 12 as per commitment. Discussion started on Brook’s law and Project manager added two new resources and postpone to complete this project in 13 months. - Month 13: Project is not yet ready and Engineers recalled to Project Manager for violating Brook’s law of adding new people. Month 14: Project is ready and released late by 2 months. Co-relates why Simulated Project delayed and How Brook’s Law applies: - - Educating New added resources: - Existing/experience (Or Best known project people) resources are being use to educate new resource which distract them from the running project work and consume their work in training work. This makes them less productivity thus its resulting in Project delay. Example – if we explain above simulation, you will see that project was 1 month delay and to cover this 1 month, project manager added two new resources and violated the Brook’s Law. In this case, when existing resources started focusing on education of new people then they would be requiring more time to complete their work and this explains why the project is delayed more. - Multiple Communication: - To make a good and successful project the communication is key and keeping every individual in sync is important. Since new resource have been added in project then more communication require to keep them in sync and also to keep watch on what every individual is doing. This requires ample time to make everybody aware with project details and keep in sync which justify the fact of delaying the project as it distracts the existing resources.