An important difference between service and manufacturing operations is that customers induce far more variability into the operation in a service system. Check all the basic types of variation that customers bring to a service system. You may select more than one answer. Single click the box with the question mark to produce a check mark for a correct answer and double click the box with the question mark to empty the box for a wrong answer. Any boxes left with a question mark will be automatically graded as incorrect.

Arrival variability

Request variability

Capability variability

Effort variability

Subjective preference variability

Service variability

System variability