In my previous post on High Level Project Estimates, I talked about 3 points estimates to help provide an up-front estime of effort for a project. Aside from the effort estimate you also need to consider other aspects that the team will spend time on. The following are some aspects I consider with the kind of percentages (above the effort estimate) I have experienced. Note: these percentages are by no means standard or the norm they are essentially a rough guess based on the projects I have worked .
- Planning Meetings @ 10%
- Demos @ 2%
- Code Reviews @ 5%
- Retrospectives @ 5%
- Dark Mater @15%
- Bugs @15%
- New Technical Stories and Spikes @ 25%
- Change Requests (shouldn’t average more than 15%)
- Holidays and Sick Leave @ 5%
You will also need to consider Management Overheads as well as Business Analysts (if included in the team), QA/Functional Testing, Support and Maintenance (if required).