Medical devices and diagnostics

Experiments here usually have about 3 factors and 15 runs. Most are full factorials. The catalog holds only a few from this field so far.

Plan one like these

Full factorial
Fractional factorial or screening
Other designs

Show the numbers

The experiments of each kind, with their median size
Kind of design	Experiments	Factors	Runs
Full factorial	2	3	15
Fractional factorial or screening	1	7	8
Other designs	1	1	24

Factors and runs are the medians of each kind.

Full factorial

Every combination of the factor levels.

Force to pull out a bone anchor: three anchor types in foam of two densities, run twice (Problem 5.29)Montgomery (2013) · 2 factors, 12 runs
Light from a liquid chemiluminescence activator: three reagents and pump type in a 2^4 with a centre run for each pump (Abbott Laboratories)Schmidt and Launsby (2000) · 4 factors, 18 runs

Fractional factorial or screening

A planned part of the combinations, to find the factors that matter.

Force to open the closure of a medical infusion bottle: seven molding variables in a 2_III^(7-4), three readings per run (Exercise 5.34)Box and Draper (2007) · 7 factors, 8 runs

Other designs

Optimal, blocked, split-plot and other designs made for the problem.

Yield of vascular grafts at four extrusion pressures, in a randomized complete block design on six batches of resinMontgomery (2013) · 1 factor, 24 runs