Quality of a service should not be determined with reference to customer perceptions

Which of the following is one of the major causes of plateauing?

A. A too rapid promotion to upper hierarchical levels B. Boredom C. Job enrichment D. A too detailed job description E. A request to mentor new, inexperienced salespeople

A reliable supplier has low variability of lead time, whereas an unreliable supplier has high variability

Indicate whether the statement is true or false.