Answer Happy

A Methods and Measurements Analyst for Digital Devices needs to develop a time standard for the task of assembling a computer mouse. In a preliminary study, she observed one of her employees perform this task six times with the following results: Observation 1 2 3 4 5 6 Time (S) 46 38 40 34 42 40 a) What is the observed time (OT) for this task? (1) b) What is the normal time (NT) for this task if the employee worked at a 20% faster pace than is average? (1) c) What is the standard time (ST) for this task if the employee worked at a 20% faster pace than is average and an allowance of 25% of the workday is used? (1) d) What is the standard time (ST) for this task if the employee worked at a 20% faster pace than is average and an allowance of 25% of job time is used? (1) e) How many observations should be made if she wants to be 0.8664 confident that the maximum error in the observed time is 0.5 second? Assume that the standard deviation of the task time is 4 seconds. (Value of Z =1.5 for 0.8664 confidence) (1)