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 Background to Agile Estimating  Background to Agile Estimating   Estimating techniques   Estimating techniques

Manage   »   Estimation   »   Estimating What and When

You need two main estimates for your project: an estimate for the Project and an estimate for the next Timebox. The estimate for the Project is a high level estimate and will be presented in a window or bounds format showing the lowest and highest possible estimate planned. The estimate for the next timebox is a detailed estimate and although it can be presented as a single number it is more often presented in a window or bounds format showing the lowest and highest estimate but in a tighter window and with a greater level of confidence over the estimate than the estimate for the whole project.

Let us imagine that you have used the Toolkit for some time and have successfully delivered a series of projects. We recommend that you subdivide your projects, especially the larger projects, into smaller more manageable sized pieces of work. So your projects are never very large and never very small. They are often a similar and typical size. They are not all going to be the same size, certainly not exactly the same size. However there is a certain level of project size predictability and if you were to take the average of all projects using the Toolkit you are not likely to see a large variance in the relative sizes of your projects.

Let us say, for example, the average size of project taken from your total project sample is 200 days. You will see other projects whose sizes are 180, 190, 220, 240 days and so on. You are not likely to see 1200 days, 16 days, 25 days and 2200 days and so on. The extent of the variance in the project size from the average project size will be minimal. Let us look at some of the estimating techniques we will use.

 Background to Agile Estimating     Background to Agile Estimating   Estimating techniques    Estimating techniques

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Estimating What and When


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