Does tagtime data model time-dependent behavior?

[philip]

Related:

How long until TagTime's estimate is accurate?

A user was asking about this and I remembered that my TagTime Minder Tool can answer such questions: It looks like you need about 200 hours’ worth of pings (5 weeks of full-time work) before you can be 90% sure that TagTime’s estimate has less than a 10% error. But the estimate will be probably approximately correct much sooner than that. For example, you can be essentially completely certain that TagTime’s estimate is within a factor of 2 of ground truth by the time TagTime reports 20 hours. A…