Question

art 250 Choose the best answer of both hands at the same time is A. flow process chart simultaneous-motion (SIMO) chart 2 The best chart used to analyze the Body is called B. Operations charts D. None of the above 3. In a stopwatch time study, the average time it takes a given worker to perform a task a certain number of times is the: A. Observed time B. Normal time C. Standard time D. Performance rating time Labor Standards May be set in four ways: C. Work sampling, historical experience, predetermined time standards, and time studies D. None of the above 5. Which of the following is correct about "time studies"? B. Timing a sample of a worker's performance and using it to set a standard C. Can be set before the work is performed D. None of the above When performing a time study, the analyst converts the observed time into the time an "average" worker would require working at an acceptable pace by using which of the following? A. allowance factors 6. B. MTM C. methods analysis performance rating ering Technology and Sci nsules K Work operation consisting of shree elements has teen subjected to a stopwatch time study. The time for time for the Ihr cperation as pmonal time 5, delay S4, and fatigue 10 % Determine the standard woxk operation (10 Marks] Joo EXeament 1 2 3 4 5 6 Rating(%) 1t0 he observed , and the adard time ST Part 2 Question I Choose the best answer 10. -Women and childre firse" declares the captain of a sinking ship. His directive employs which of 115 Marks) 12.5 @each passengers? ollowing queue disciplines in A Prionity 8 Random C. FTFO or FIPS D. None of the above I1. A waiting line, or queuing, system has thrce parts, which are A. distribution of aerival times, discipline while waiting, and distribution of service times B. arrival rate, service rate, and utilization rato C arrival discipline, queue discipline, and service sequencing D. arrival or inputs, queue discipline or the waiting line itself, and the service facility 12. A small beauty salon has several operators. Whi le customers do not have appointments, each is waiting to be served by a specific operator. This scenario provides an example of a A. multiple-channel, multi-phase, limited queue length B single-channel, multi-phase, limited queue length C multi-channel, limited queue length D. multiple single-channel systems, limited queue length Page |S of s ix. Which one of the following is mot a characterissc of a Model C or M/D/I sys A single chanel B single phase C Poisson arrival rate patern D. exponential service time pamem 14. Which one of the foillowing is not a characteristic of a Model B or M/M/S syssem? B. single channel C single qeeue D. single phase 1S. A university has several technicians in the repair station to care for the computers in the studen labs. This system is most hkely A. single channel, limited queue system C. mulochantel, İímited queue system B. single channel, limited population system D muli-channel, limined population system Question 2 125 Marks] I6. A crew of mechanics at the Highway Department garage repair vehicles that break down at an average of λ-9 vehicles per day (approximately Poisson in nature). The mechanic crew can service an average of μ-12 vehicles day with a repair time distribution that approximates an exponential distribution a. What is the utilization rate for this service system? b. What is the average time before the facility can return a breakdown to service? c. How much of that time is spent waiting for service? d. How many vehicles are likely to be waiting for service at any one time? [5 marks] uity of Engineerning Techeology and Scince Page 16 of 8 cafeteria has a single checkout lane manned by a single cashier with student times and A Coland service times that follow the distributions from the following tables: arrival between arrivals (min 110 ma Fre 15 24 27 12 Frequency (6) 15 35 Service Time (min) 28 Simulate the arrival of the first 5 students and calculate the following: average inter-arrival time. average service time. average waiting time. Use the random numbers given below: 13, 6, 76, 89, 10, 54, 71, 66, 52, 74 1Z. A crew of mechanics at the Highway Department garage repair vehicles which break down at an average of vehicles per day (approximately Poisson in nature. The mechanic crew can service an average of u 11 vehicles per day with a repair time distribution that approximates an exponential distribution. a. What is the probability that the system is empty? b. What is the probability that there is precisely one vehicle in the system? c. What is the probability of 4 or more vehicles in the system? [5 marks] 18. A dental clinic at which only one dentist works is open only two days a week. During those two days, the traffic is uniformly busy with patients arriving at the rate of three per hour. The doctor serves patients at the rate of one every 15 minutes. a. What percentage of the time is the dentist busy? b. What is the average number of patients in the waiting room? c. What is the average time a patient spends in the office? 15 marks]

Answer 1

#1)

1. The SIMO chart is an extremely detailed two hand chart, which records the therbligs performed by both the the hands simultaneously

Ans: (D) simultaneous -motion (SIMO) chart

2. A simultaneous -motion (SIMO) chart is the best chart to analyze body movements.

Ans: (D) None of the above

3. In a stopwatch time study , the average time to perform a task by a worker is called the observed time

Ans: (A) Observed Time

4. Labour standards are set in 4 ways; historical experience, time studies, predetermined time standards and work sampling

Ans: (C)

5.In time studies , by timing a sample of a worker's performance a standard can be set

Ans: (B)

6. A performance rating is used to convert observed time to standard time to do a task in time studies

Ans: (D) Performance rating