Introduction¶
Experiment¶
Deliberate variation of one/more process variables while observing effect on one/more response variables
Experimental Design¶
- Maximize information gain
- Minimize resources (time and cost)
DOE is a procedure to plan experiments to efficiently provide valid conclusions
Does the experiment have enough statistical power to answer research questions?
Types of input variables¶
| Dealing | |
|---|---|
| Controlled | Variation + repeats/replication experiments in a systematic way |
| Uncontrolled & observed | - Blocking: group experiments into blocks, each having a fixed value of the variable - Analysis of covariance: Model impact of variable, and then subtract it out |
| Uncontrolled & unobserved | Randomization: Impact of variable averages out to 0 |
Nuisance inputs: Inputs that we don’t care about, but affect the output