I've done this a few times, once for a small usability design company who needed more functional test knowledge in a fixed price project and sometimes for firms that want testing training; quite lucrative but short term. But I also have a good mate who's done a fixed price project as PM at a multinational and says he'll never do that again because he found himself working silly hours and treating those around him like tulip to try and get it done reasonably within his own budget, and eventually found himself discussing contracts and various legalese sub-paragraphs with corporate lawyers from his clientco; if you end up in that position as a small consultancy then you don't stand much chance because the business relationship is so heavily skewed in their favour.
Charging by deliverables might work better if the deliverable is defined well and the scope is limited and clear, and that's why I do it when I give training or coaching seessions; basically I charge a fee per lesson and if a lesson happens to run 10 minutes longer or shorter but the content has been handled then it usually goes OK and I've found I can make a fair whack of dosh in a short time between contracts. Thing is, to keep my network and credibility I have to do the nitty gritty in longer contracts, so I don't think it's a good primary business model for me; I'm not one of the 'famous names' in the world of testing like the Bachs, Bolton, Kaner who can earn a very good living by giving courses and speeches and actually I don't want to be one of them as they seem to spend a lot of time either in aeroplanes are having heated arguments with people while I'd rather be testing. Anyway, for me it's good as a secondary income stream that occasionally adds up to quite a lot.
Charging by deliverables might work better if the deliverable is defined well and the scope is limited and clear, and that's why I do it when I give training or coaching seessions; basically I charge a fee per lesson and if a lesson happens to run 10 minutes longer or shorter but the content has been handled then it usually goes OK and I've found I can make a fair whack of dosh in a short time between contracts. Thing is, to keep my network and credibility I have to do the nitty gritty in longer contracts, so I don't think it's a good primary business model for me; I'm not one of the 'famous names' in the world of testing like the Bachs, Bolton, Kaner who can earn a very good living by giving courses and speeches and actually I don't want to be one of them as they seem to spend a lot of time either in aeroplanes are having heated arguments with people while I'd rather be testing. Anyway, for me it's good as a secondary income stream that occasionally adds up to quite a lot.
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