FieldsHousehold and everyday life
Experiments here usually have about 3 factors and 8 runs. Most are full factorials.
- Full factorial
- Fractional factorial or screening
Show the numbers
| Kind of design | Experiments | Factors | Runs |
|---|---|---|---|
| Full factorial | 7 | 3 | 8 |
| Fractional factorial or screening | 3 | 5 | 16 |
Factors and runs are the medians of each kind.
Full factorial
Every combination of the factor levels.
- Arif's summer electricity use: thermostat setting A and window blinds B, and two runs beyond the cubeDunn (2015) · 2 factors, 6 runs
- Michael's boiling water: amount A, lid B and pot size C, eight runs and three moreDunn (2015) · 3 factors, 11 runs
- Rishat's cut roses: sugar S and vodka V in the vase water, a centre point, and a sixth run in VDunn (2015) · 2 factors, 6 runs
- The cook's soup pots: amount of water W and size of pot P, a destructive interaction on boiling timeDunn (2015) · 2 factors, 4 runs
- Microwave popcorn: brand, time and power in a 2^3 factorial, with taste and the weight of unpopped kernelsAnderson and Whitcomb (2007) · 5 factors, 8 runs
Fractional factorial or screening
A planned part of the combinations, to find the factors that matter.
- Distance a catapult throws a ball against five factors: a 2^(5-1) resolution V with four centre runsNIST/SEMATECH e-Handbook of Statistical Methods (2020) · 5 factors, 20 runs
- Pulls to start a weed whacker: prime pumps, choke pulls, gas and choke settings in a 2^(5-1) half fractionAnderson and Whitcomb (2007) · 5 factors, 16 runs
- The popcorn 2^3 cut to the half fraction ABC = +: a resolution III design and its aliasesAnderson and Whitcomb (2007) · 3 factors, 4 runs