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On 2012-06-08 05:48, Eric S. Johansson wrote:
I'm using a spreadsheet to track a project (yes I know not a good idea but that's what the customer wants). Each task is listed with certain number of days plus a slip factor. I calculate the project completion date by summing the number of days and the slope factor and add that to the previous date (which may have slipped which is why I reference the next task off of that date).

How can I encapsulate the time calculations so that I use the same cell equation for all of them? The patter I'm currently using is letter -1 and letter -2 (number of days for project plus days of slippage) plus date in number -1 (up one cell).

another question is if I insert a new row because I'm adding a task, or delete a row, how can I make the total display automatically without having to tweak the cell numbers?is there any form of symbolic reference?

Many thanks
--- eric

I might be doing something similar tracking expenditure but can't really visualise your layout. I have a column that would be the completion date of each task, that in your case would be the end date of the previous task + task duration + slippage of the current task. I include an IF statement so that if I enter an actual completion date in a column that is used in place of the date calculated for that previous task and the new anticipated project completion date is shown at the end. You can hide the column calculating each completion date from the previous so it does not clutter your sheet.

With an example I could help you a bit more.

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