The vendor would like to sell coffee on cold days US $2,000) and soft drinks on hot days US $2,500). Hot days are expected 40°l0 of the time. Hence, the probability is 40°f0 of making US $2,500 by selling soft drinks. The chance of making US $2,000 by selling coffee is 600k. The payoff equation is:
4 US $2,600) + .6 $2,000 = US $2,200
A beverage stand can sell either soft drinks or coffee on any given day. If the stand sells soft drinks and the weather is hot, it will make US $2,500; if the weather is cold, the profit will be U $1,000. If the stand sells coffee and the weather is hot, it will make US $1,900; if the weather is cold, the profit will be U $2,000. The probability of cold weather on a given day at this time is 60%.

A criterion that requires all customer inquiries to be answered within 7 days of receipt permits accurate measurement of performance. The quantitative and specific nature of the appraisal using this standard avoids the vagueness, subjectivity, and personal bias that may afflict other forms of personnel evaluations.