Why can't you do it? We're not asking for anything more, it's actually less than what you delivered before. Don't let a client, or anyone for that matter, corn

Why can't you do it? We're not asking for anything more, it's actually less than what you delivered before. Don't let a client, or anyone for that matter, corner you w/statements like that. Regardless of whether they were right or wrong, in terms of the amount of work they're asking for being less than the previous, have something to show in regard to why it's not as simple as they perceive. For example, consider adopting a thorough estimating strategy, broken down into small iterations of work. An estimate showing the amount of hours or calendar days the next iteration would take, accompanied by more realistic dev-hours-per-week (burn rate), would have been the right way to counter the client's statement. It's much harder to argue with with supported numbers. My grand plan to under promise and over deliver had led to a disaster! Any plan where you take on more work than you can handle in a given time frame will lead to disaster. Under promising and over delivering had little, if anything, to do here. This was entirely a management problem (dev schedule, client expectations, etc.).