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27 Employees, 3 Crews, 1 Forest. How to assign the employees to surveying crews for a nine-week period. Group Members: Lisa, Tim, Xinhua, Matt B., Laura, Zi. Overview & Requirements. 27 employees – 3 crews of 9 9 weeks of surveying Each person must have a turn as the data recorder
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27 Employees, 3 Crews, 1 Forest How to assign the employees to surveying crews for a nine-week period. Group Members: Lisa, Tim, Xinhua, Matt B., Laura, Zi
Overview & Requirements • 27 employees – 3 crews of 9 • 9 weeks of surveying • Each person must have a turn as the data recorder • Crews should be remixed each week
Why is this statistical? • Randomization • Permutations • Design ideas • Constraints
Solution • Everyone writes names (numbers) on piece of paper. • Choose (randomly) the recorders for each week. • Non-recorders are randomly assigned to a crew each week.
Example of Week 1 23 2 13 18 5 6 14 22 8 24 3 19
Tools & Information • Tools • Knowledge of randomization • Could use a computer, but a hat suffices • Information • Employer • Other statisticians/forest surveyors • Basic design book (e.g. Gary’s)
Thoughts & Ideas • Assignment of recorders on first day • Ease of recording – should people do some of that each week? • Abilities of scientists • Personality conflicts • People missing, sick, etc.