Cross-referencing dates in Excel gantt chart

K

Karl

Hi,

Using the workday function, a series of if statements and conditional
formatting I’ve created a Gantt chart in Excel that pretty much behaves like
a Gantt chart in Microsoft Excel.

You fill in a table of dates, choose who is responsible for the task and the
Gantt chart populates automatically. Pretty much the final thing I want to do
with it is allow the person filling it out to choose the predecessor task.

At the moment, each task starts a day after the task in the row above.
Currently, the table of dates looks like this:

Column A – Task number (1,2,3,4,5 etc.)
Column B – Task name
Column C – Task owner (determines conditional formatting of bar cells in
Gantt chart)
Column D – Task start date
Column E – Task end date
Column F – Task duration

The start date of the first task is entered manually, after that start dates
are the end date of previous task + 1 working day. This is mostly ok, but
sometimes the dependency isn’t on the previous task, it may on a task two or
three lines up.

What I want to do is insert a new column G, labelled “Predecessorâ€. Instead
of the start date being “previous task + 1 working day†the start date cell
for each task would look at the task number in column G. It would match this
to the corresponding value in column A (task number) and take the “end date
of specified task +1†as its start date.

Is there any way I can do this or am i just expecting far too much of Excel?

Thanks

Karl
 
B

Bob Phillips

You were asking for a formula to calculate the start date of subsequent
rows, so column D.
 

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