When a development team decides to migrate to extreme programming (XP), the natural tendency is to focus on the programming practices, including unit testing, continuous integration, refactoring ...

Program timescales estimate the amount of time necessary to complete the program objectives, activities and tasks. Timescale objectives involve identifying the earliest time a unit of work can ...

However, parallel programming using threads is complicated and hard to debug. When a thread modifies data that might be read by other threads, the programer has to insert proper synchronization.