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    How do you estimate projects deadline?


    High;

    I don't understand how people set deadlines for their projects.

    I have no idea how long something could take.

    How do you estimate deadlines?

    Thanks
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    Requinix do you know about Brian Tracy? Ever follow his systems? Thoughts?
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    Devshed Loyal (3000 - 3499 posts)

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    Are you hard core planner? Or you just sit and work?
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    Grumpier old Moderator
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    The 80-20 rule: The first 80% of the project takes the first 80% of the time. The last 20% takes the remaining 80% of the time.
    [
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    Doug G
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    I've never been able to appreciate the sublime arrogance of folks who feel they were put on earth just to save other folks from themselves .." - Donald Hamilton
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    Originally Posted by English Breakfast Tea
    Requinix do you know about Brian Tracy? Ever follow his systems? Thoughts?
    Never heard of him.

    Originally Posted by English Breakfast Tea
    Are you hard core planner? Or you just sit and work?
    Most developers would rather sit and work. Good developers will still plan, but it's the in-the-head type of planning and not the let's-schedule-a-meeting type.

    Another 80/20 rule is that you can plan for up to 80% but there will always be 20% of unknown. (Really, there are a bunch of 80/20 rules.) Trying to plan for the 20% just wastes time and getting down to work is the only way to deal with it.
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    I don't really see a way to set a correct deadline. Maybe if you have a lot of experience in a very similar task to the current one, you could do it. But overall everything I did has taken much more time than I thought. Things always seem easier than they are. When you start working on them, all kinds of problems and additional tasks are revealed.

    This is why I am not a fan of deadlines and creating exact long term plans. They are not correct and you do not have all the information at the beginning. You receive new information when you are in the middle of it, and then you can make much better decisions. This idea is also mentioned in the book Rework by Jason Fried.

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