Marcia visited american eagle, an apparel store, to browse through the new spring collection. the sales associate greeted her when she entered the store, showed her the new collection, and stayed with her throughout her shopping experience, bringing her additional items while catherine was in the dressing room. this sales service can best be described as

Statistical process control charts: a. indicate to the operator the true quality of material leaving the process. b. display upper and lower limits for process variables or attributes and signal when a process is no longer in control. c. indicate to the process operator the average outgoing quality of each lot. d. display the measurements on every item being produced. e. are a graphic way of classifying problems by their level of importance, often referred to as the 80-20 rule.