I have a spreadsheet that tracks production of an assembled part. I manually
enter in the dates starting from left to right of the start of assembly of
the part to testing, and other associated functions. the last date entered is
the expected date that the assembled part is placed into stock.

Knowing the start date and how long it takes from finish to end, can I
create a formula to enter in the start date and have the spreadsheet
extrapilate fill in the associated dates to completion baseed on seperate
functions of assembly?