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Last week I discussed our approach to maintenance, based on allocating a fixed weekly time with a dedicated cycle of planning and review.

I promised I would elaborate more on that, focusing on how we measured the process and improved it over time. So here we are!

In the first post I said we settled with 20-30% of the weekly dev time dedicated to maintenance. After I wrote it, a few people asked: "Isn't that too high?". While others said: "Isn't that too low?".

This seems one of those situations where the answer is inevitably "it depends", but no, I will take the leap and argue that this number should work just fine for almost everybody.

Let me explain.