Gаs Chrоmаtоgrаphy is a methоd of separating _______________________ compounds so that they may be detected individually in complex mixtures.
Use the fоllоwing infоrmаtion to аnswer Questions 2-4. The formulа sheet is here: Formula sheet_Midterm.pdf A grocery store has two checkout counters. Each counter can serve 5 customers per hour on average. It is estimated that a customer completes the purchase and needs to check out every 15 min on average. Assume that the inter-arrival time and the service time follow exponential distribution. What is the average service rate of the whole system?
Use the fоllоwing infоrmаtion to аnswer Questions 18-20. The formulа sheet is here: Formula sheet_Midterm.pdf The following flowchart shows the main activities for processing on-line credit-card applications at a bank. Each activity’s processing time and waiting time are listed in Table 2. Please answer the following questions. What is the actual cycle time of this process?
Use the fоllоwing infоrmаtion to аnswer Questions 6-9. The formulа sheet is here: Formula sheet_Midterm.pdf Consider this process for the manufacturing of clothes for Gap. Blanks stored in raw material inventory are cut and then sewn and put in finished goods inventory. There is no buffer between cutting and sewing. The processing time of each activity is deterministic. How long does it take from the time a blank is pulled from raw material inventory (Blanks) to the time it is placed in finished goods inventory (FGI)?
Use the fоllоwing infоrmаtion to аnswer Questions 21-25. The formulа sheet is here: Formula sheet_Midterm.pdf Purchasing requests arrive to an agent at an average rate of 6/day. The agent requires on average 1 hour to process a request. Assume 8 hours per working day, and assume exponentially distributed inter-arrival time and service time. How many requests on average are waiting to be processed?
Use the fоllоwing infоrmаtion to аnswer Questions 10-13. The formulа sheet is here: Formula sheet_Midterm.pdf A golf-club manufacturer operates 7 hours per day with a daily output of 25 customized clubs. The manufacturing process consists of 10 major activities. The following table provides activity description, activity time (in minutes), and immediate predecessor(s) for each activity. Please answer the following questions. Which of the following activities is NOT value-adding?
Use the fоllоwing infоrmаtion to аnswer Questions 2-4. The formulа sheet is here: Formula sheet_Midterm.pdf A grocery store has two checkout counters. Each counter can serve 5 customers per hour on average. It is estimated that a customer completes the purchase and needs to check out every 15 min on average. Assume that the inter-arrival time and the service time follow exponential distribution. Constrained by the layout of the grocery store, the manager requires customers to form two separate lines with each one dedicated to a checkout counter. This means that a customer in one line can only be served by the counter for that line. To reduce customers’ average waiting time, the manager should do which of the followings?
Use the fоllоwing infоrmаtion to аnswer Questions 18-20. The formulа sheet is here: Formula sheet_Midterm.pdf The following flowchart shows the main activities for processing on-line credit-card applications at a bank. Each activity’s processing time and waiting time are listed in Table 2. Please answer the following questions. What is the total processing time (or theoretical cycle time) of this process?
Use the fоllоwing infоrmаtion to аnswer Questions 2-4. The formulа sheet is here: Formula sheet_Midterm.pdf A grocery store has two checkout counters. Each counter can serve 5 customers per hour on average. It is estimated that a customer completes the purchase and needs to check out every 15 min on average. Assume that the inter-arrival time and the service time follow exponential distribution. What is the average arrival rate of the whole system?
Use the fоllоwing infоrmаtion to аnswer Questions 6-9. The formulа sheet is here: Formula sheet_Midterm.pdf Consider this process for the manufacturing of clothes for Gap. Blanks stored in raw material inventory are cut and then sewn and put in finished goods inventory. There is no buffer between cutting and sewing. The processing time of each activity is deterministic. Is any activity starved or blocked?
Use the fоllоwing infоrmаtion to аnswer Questions 10-13. The formulа sheet is here: Formula sheet_Midterm.pdf A golf-club manufacturer operates 7 hours per day with a daily output of 25 customized clubs. The manufacturing process consists of 10 major activities. The following table provides activity description, activity time (in minutes), and immediate predecessor(s) for each activity. Please answer the following questions. What is the capacity of this process?
Use the fоllоwing infоrmаtion to аnswer Questions 21-25. The formulа sheet is here: Formula sheet_Midterm.pdf Purchasing requests arrive to an agent at an average rate of 6/day. The agent requires on average 1 hour to process a request. Assume 8 hours per working day, and assume exponentially distributed inter-arrival time and service time. What is the probability that a new request arrives to find two or fewer requests already in system?