10 What are the uses of DOE?
DOE is used when more than one input factor is suspected of influencing an output.
What is the effect of temperature and pressure on the strength of a glue bond?
A rental car company compares the tread wear of four brands of tires, while also controlling for the type of car, speed, road surface, weather, and driver.
A company uses drill tips to determine the hardness of the metal plates it produces. There are different types of drill tips that the company can use, and the company wants to determine whether the different types of tips result in similar hardness measurements.
An engineer suspects that the surface finish of metal parts is influenced by the type of paint used and the drying time.
A pullover company analyses the effect of three marketing strategies:
- advertisement in local newspaper,
- presence of sales assistant,
- luxury presentation in shop windows.
A study is to be planned in the framework of a prophylactic program for children of preschool age. Answers to the following questions are to be expected:
- Are different intensity levels of instruction in dental care for pre-school children different in their effect?
- Are they substantially different from situations in which no instruction is given at all?