Outlining thoughts for Donna project

db.md

Goal

• decomission a legacy bespoke PHP application
  • replace it with an open source ETL where it makes sense to do that
  • transition it's functions into other things where it doesn't

Moving parts

So the bits which jump out immediately:

1. Replace with open source ETL
   • List items to replace with OS ETL
   • Evaluate for commonalities
     • Refactor into separate item
   • Foreach item
     • Detail how they will be replaced
2. Transition to other things
   • List "other things," each and every one of them
   • Evaluate for commonalities
     • Refactor those into separate item, if applicable
   • Foreach item
     • Decide to what will it be transitioned
       • Deciding can be a project in itself, alas.
     • How will that transition occur

Project planning

Once you have those items identified…

1. Split into phases
   • Common bits for ETL & non-ETL (if applicable)
   • Break down each phase
   • Run past team member(s) for reality check/best & worst case scenarios
2. Work with teams for estimates
3. Correlate against customer needs
4. Add appropriate padding
5. Set delivery dates for each phase