# Clue to Riddle #89: Rate Determining Step

89. A manufacturing process for ceramics exists as described below:
Clay is sourced - unlimited supply.
The ceramics are shaped - takes about half an hour & there are 4 shapers.
They're painted - takes about half an hour (3 painters.)
Fired in a kiln - 300 at a time & takes 2 days.
Glazed - takes 15 minutes (2 glazers.)
Dried - takes a week but they have space to dry a lot, lets say 1000.
What is the maximum rate the ceramics can be produced?
The trick to solving this puzzle, as with all rate determining step problems, is to work out the step in the process that takes the longest per item.

If that's not clear what I'm saying is you need to work out how long it takes to do one and identify the one and the longest one is it.

Where next?

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