Propagating and planting schedule

Has anyone developed a spreadsheet or use some sort of software that tells you when and how many plants to propagate and plant out at what interval?

I'm planning a large annual vegetable and cut flower raised bed garden using the square foot method and is trying to wrap my head around how I will plan all the planting.

Oh Tom. That sounds like a worthy endeavour! I can't help, but it shouldn't be too difficult to come up with a theoretical spreadsheet - starting at the end point: areas, spacing, days to maturity and so on.
The trouble I find is that plants don't read books, so even sowing times never seem to apply to a specific situation. I'm trying to record my own timings better (this is the second year) so that I can learn for my situation what my sowing window might be. So last year I planted my broad beans direct on the 10th of April. That was pretty late though. This year I hope to stagger the sowing days and start maybe a month earlier and sow 2 weeks apart.

Last year I went through my ridiculous stash of seeds and sorted out what I was going to plant.

I threw them into an Evernote table and looked up and added when/where each should be started, with detailed instructions.  I printed it out so it was in my seed-starting area and highlighted what needed to be done first (in the absence of a sort by date function).  Then I tried to follow my schedule.

Then life happened and everything failed.  But!  I think I'll try again this year, and fingers crossed for no Life Happening.

It looked something like this:

Seeds, where and when to plant

Last frost date May 1-10, say 15
Eisheiligen May 11-15
Early spring is probably Feb

English Name	German Name	Start inside date	Conditions	Finished (check when done)	Plant outside date	Location	Finished (check when done)	Harvest Date	Yield	Notes
Goat's beard	Wald-Geißbart	N/A	N/A	N/A	Now, pots, moist compost, barely cover	West hedge		April/May future years		Aruncus dioicus, 2m high, treat like asparagus