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In this article, author talks about how to improve the accuracy of software development effort estimations. He suggests to use relevant historical data improve estimation accuracy and to avoid early estimates based on incomplete information. He also discusses how to measure and predict productivity in software projects.

A few years ago, I took on a freelance project to implement an Internet Explorer component in C++. I was billing a healthy hourly rate on other projects at the time, but this particular client insisted on a fixed price. In a bout of temporary insanity, I made an exception.... Every developer knows that accurate software estimation is not possible even when perfect information is available about project requirements (i.e. practically never).....

podobne nazory na estimate trvania taskov som cez vikend cital aj v tomto clanku https://techcrunch.com/2016/12/11/death-to-jira/ , odhady veru nie su easy

Z toho clanku "death to JIRA" vypichujem: For some reason many companies today seem to be terrified of the prospect of writing more than a couple of paragraphs of clear and simple prose. But a well-written 8-page document can define the nuances of a complicated system far better than a whole cumbersome flotilla of interlinked JIRA tickets. ... Feature planning is about communication. JIRA is fundamentally a terrible way to communicate the requirements of a complex system. Words in a row, if written well, will always be better. A v dost vela veciach suhlasim.

1. write it the night before 2. qualify the contents 3. assign time estimates 4. use sections 5. re-evaluate items you've put off