Problems on Time study to calculate the standard time 1. A work-study sample of a manufacturing activity conducted over a 40-hour period shows that a worker with an 85% rating prbduced 12 parts. The worker's idle time was 10% and the allowance factor was 12%. Find the Normal and Standard time for this activity. 2. On average, a task takes 22 minutes for a worker whose performance level is judged to be 90%. a) Compute the normal time. b) Calculate the performance level of worker who performs the same task in 19 minutes. c) How fast may the same task be performed by a worker with a performance level of 130%? d) Calculate the standard time if the total time allowance is 15% of job time. 3. A time study was conducted on a job consisting of three elements. Stopwatch readings in hundredth of a minute are given. Using cumulative timing method along with rating factors, calculate the standard time if allowance is 12% of normal time. Element Stop watch readings 1 2 3 4 5 Rating 10 73 139 203 266 80% B 25 88 155 218 280 100% 64 193 257 320 110% Hint: Given Stopwatch readings are cumulative. Element Individual elemental readings Observed Normal time 1 2 3 5 time (min.) Rating OT XR A 128 B