No client would ever read this, and much of the language in it wouldn't make sense to the kind of client that most needs the explanation.
You're better off avoiding getting to this point in the first place. Maintain a good relationship with cooperative clients and they won't (usually) complain, because they value your work. You should fire uncooperative clients and let them be someone else's headache, when possible.
Adding a little more detail to line items in invoices helps a lot too. "Fix bug report #493" should usually be, "Investigate report of incorrect discount calculation (#493), modify 1 file, review code, deploy to test, test for regressions (all tests passed), deploy to production."
It seems dumb and repetitive to us, but one of those descriptions looks like 4 hours' work to the person approving the invoice, and the other doesn't.
You're better off avoiding getting to this point in the first place. Maintain a good relationship with cooperative clients and they won't (usually) complain, because they value your work. You should fire uncooperative clients and let them be someone else's headache, when possible.
Adding a little more detail to line items in invoices helps a lot too. "Fix bug report #493" should usually be, "Investigate report of incorrect discount calculation (#493), modify 1 file, review code, deploy to test, test for regressions (all tests passed), deploy to production."
It seems dumb and repetitive to us, but one of those descriptions looks like 4 hours' work to the person approving the invoice, and the other doesn't.