Just to clarify what I mean by "same project, different requirements": you deliver a dashboard to customer A, who is quite helpful and clearly communicated what

Just to clarify what I mean by "same project, different requirements": you deliver a dashboard to customer A, who is quite helpful and clearly communicated what he wanted. It took 6 months. Customer B asks for a dashboard like that of customer A. However, unlike customer A he keeps nitpicking the design to the pixel, and forgets to mention the company is in the process of migrating database providers. Meanwhile the senior dev who put out all the fires that allowed the first dashboard to be done on time quit due to burnout. The team has no idea why the Jenkins machine keeps crashing. Good luck with your estimate.