summarize this text $-$ "The third RUMBA characteristic relates to whether it is measurable. Can your performance be measured? The answer is yes. Typically, factors such as time, productivity, quantifiable results, revenue, and manner of performance $($how you accomplish your job tasks in terms of following an established step$-$by$-$step formula$)$ are used to determine your accomplishment of goals. In a production environment, or in certain sales environments, performance can be measured by reviewing the number of products made or sales completed. In a purely customer$-$focused environment, service measurement can be in terms of factors such as talk time on the telephone, number of customers effectively served, customer feedback surveys and satisfaction cards, and letters or other written correspondence$$or$,$ on the negative side, by customer complaints."