To plan or not to plan

There is a theory in manufacturing and production called "JIT" or "just in time".  Inventory arrives "Just in time" so no need to hold a lot of inventory or store much etc.

It has always made me uneasy.  "Just in time" leaves too much room for "out of stock" or "sorry no product available", not to mention things like power outages or zombie apocalypse...

However I assume minds much brighter than my own had looked through all the contingencies and logistics and economics and who was I "woman of plan B, C, D, E and F" to argue?

In my own life planning is my thing.

I not only plan for the actual event or thing but I also plan for (not just think about but actually plan for) a range of eventualities like variables in weather, attendees, souffle collapses, nose bleeds, zombie apocalypse etc.

And yet lately an odd thing has started to happen.

I have been very busy and my planning ahead has suffered.  Of course scaling back on the number of things I had to plan didn't occur to me.

As my planning time became constrained I ended up doing things rather last minute or "just in time".

It has been amazing to me that on several occasions I had the exact bright idea or found the thing I needed with only 24 hours or less until I had to deliver/show up.

And shockingly the result was pretty much as good as if I had planned it for weeks, at least to those on the receiving end!

WHAT?

Last night was my annual Art Auction Fundraiser for work.  An event that requires me to be Executive Director-ish in behaviour and appearance.  I usually get a dress.
I did try on 5000 (I wish I was joking) dresses with a few days to spare and nothing worked.
So with a little over 24 hours to go and despite the recent lessons of "Just in Time" I had little expectation I could actually pull this off - I had a back up outfit picked out.  But I found myself with 20 minutes to spare, within shooting distance of a dress shop, which had not other customers.  So I  walked in and declared to the two delightful ladies working "Hello!  I need a dress for a smart work event. Tomorrow.  It needs to fit perfectly and cost no more than $xx and I have to like it. GO". 20 minutes later I walked out with 2 /TWO/ DEUX dresses and some serious underwear to suck and lift in all the right places!

Just in time.

So here I am left with a dilemma.

Can I trust this "Just in time" method of living life or shall I revert to my old (over) planning ways.

I suppose there is a middle ground in there somewhere?

Maybe I will find it, just in time?