Project scale is repeated physical readout with an exact day ledger. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
A run is lanes times reads times length
There are 4 lanes, 5 reads per lane, and 100 bases per read, so one run has 2000 bases.
Brun=4⋅5⋅100=2000
Instrument-days scale the run output
With 2 instruments and 3 runs per day, the output is 12000 bases per day. A 24000 base target takes 2 days.