From my limited non-driving interaction with my Prius, I concur with the rough percentages in this pie chart. imgur: the simple image sharer originally from: Working on my car : funny
I agree with the looking for tools bit: it's amazing how they disappear. Even more fun is looking for fasteners you dropped, especially when dropped into the innards.
When working on my car, I spend about 5% of the time filling out paperwork, and 95% of the time sitting in the waiting room playing with my iPad.
That graph is pretty accurate for a lot of work, actually... I work with a high school robotics team, and I'd say it's pretty accurate for our time there! The worst part... We've got 8 pairs of needle nose pliers, and yet we can never find them when we need them! On a completely unrelated note... I hate how my company blocks some sites, like imgur... To see the pie chart, I was reduced to copying the URL, plugging it into a QR-Code generator, and using that to pull it up on my iPhone... all that, and it was still quicker than typing it in!
Considering this is FHOP, shouldn't that be called a pancake chart? That chart does illustrate why my method of estimating time required for a job works. 1. Estimate how long the job should take. 2. Double the number and go to the level of units. If your initial estimate is 1 hour, double the one and change the units to days. Actual time will be 2 days. That accounts for hunting for tools, finding dropped parts and driving to stores that don't have the new part you need.
I guess I'm a ricer because a significant portion of my work-on-car time is trying to figure out which of several competing parts to buy for my car.