FieldsPaper and pulp
Experiments here usually have about 3 factors and 27 runs. Full factorials and response surface designs are the most common. The catalog holds only a few from this field so far.
- Full factorial
- Central composite or Box-Behnken
- Other designs
Show the numbers
| Kind of design | Experiments | Factors | Runs |
|---|---|---|---|
| Full factorial | 2 | 3 | 22 |
| Central composite or Box-Behnken | 1 | 2 | 10 |
| Other designs | 3 | 3 | 32 |
Factors and runs are the medians of each kind.
Full factorial
Every combination of the factor levels.
- Strength of paper at three hardwood concentrations, three pressures and two cooking times, run twice (Problem 5.18)Montgomery (2013) · 3 factors, 36 runs
- Tear resistance of paper bags against type of paper, humidity and direction of tear, a 2^3 replicated three times (Exercises 4.11 and 4.14)Box and Draper (2007) · 3 factors, 8 runs
Central composite or Box-Behnken
Extra runs that fit curvature, to find an optimum.
Other designs
Optimal, blocked, split-plot and other designs made for the problem.
- Contact angle of plasma-treated paper: pressure, power, gas flow and gas type set for the reactor (whole plots), two paper types treated together (Bisgaard et al. 1996) (Problem 14.26)Montgomery (2013) · 5 factors, 32 runs
- Paper strength at seven hardwood concentrations in a balanced incomplete block design on seven days (Problem 4.42)Montgomery (2013) · 1 factor, 21 runs
- Tensile strength of paper against three pulp preparation methods and four cooking temperatures, three replicates: a split-plot design with the methods in the whole plotsMontgomery (2013) · 3 factors, 36 runs