Exam 7: Constraint Management

Table 7.1 The figure above shows the call routing process for a customer service call center.Incoming calls are routed,depending on the complexity of the caller's request.Simple request are routed to work center B,while the more complex calls are routed to work center C (which also takes simple calls when not busy).The numbers in parentheses are the time in minutes for each step of the process. -Use the information in Table 7.1.What is the process bottleneck?

Table 7.10 Balance the following line for an output rate of five pieces per hour.The times are in minutes (not seconds). -Use the information from Table 7.10.The highest efficiency for a balanced line is:

Table 7.6 Burdell Industries makes four different models of computer printers: the E-1000,the S-2000,the P-2000 and the N-1000.The E-1000 sells for $200 and has $40 in parts and $40 in labor;the S-2000 sells for $150 and requires $30 in parts and $30 in labor;the P-2000 sells for $100 and has $20 in parts and $20 in labor;and the N-1000 sells for $75 but requires only $10 of parts and $10 of labor.Fixed overhead is estimated at $5,000 per week.The manufacture of each printer requires four machines,Machines #1,2,3 and 4.Each of the machines is available for 40 hours a week and there is no setup time required when shifting from the production of one product to any other.The processing requirements to make one unit of each product are shown in the table.Weekly product demand for the next planning period has been forecasted as follows: 80 E-1000s;65 S-2000s;35 P-2000s;and 20 N-1000s. In the questions that follow,the traditional method refers to maximizing the contribution margin per unit for each product,and the bottleneck method refers to maximizing the contribution margin per minute at the bottleneck for each product. -Use the information in Table 7.6.Using the bottleneck method,in what sequence should products be scheduled for production?

Operating processes close to their capacity can result in low customer satisfaction and even losing money despite high sales levels.

A line that produces several items belonging to the same family is called a:

Instead of dividing by nc to determine the efficiency of a line balance,you could divide by:

An assembly line has to perform 10 work elements,whose time requirements follow.An operations analyst has found a solution using some heuristics,as shown in the table.If the cycle time of the line is 90 seconds,what is the efficiency of the assembly line?

Table 7.14 The production of a particular product consists of seven work elements.The desired output rate is 60 units per hour.The work element and their precedence relationships are given. -Use the information in Table 7.14.How many stations are required for the most efficient balance you can achieve?

In a drum-buffer-rope system,the lot size that moves from one work center to another for additional processing is a(n):

Regardless of the number of tasks or their lengths,a line balance efficiency of 100% is possible if the number of stations is ________.

Table 7.10 Balance the following line for an output rate of five pieces per hour.The times are in minutes (not seconds). -Use the information from Table 7.10.The theoretical minimum number of stations is:

Any system composed of resources that are operating at maximum output will,by definition,have maximum output for the entire system.

Which of the following statements regarding setups is TRUE?

Balance delay could be described as the:

Table 7.6 Burdell Industries makes four different models of computer printers: the E-1000,the S-2000,the P-2000 and the N-1000.The E-1000 sells for $200 and has $40 in parts and $40 in labor;the S-2000 sells for $150 and requires $30 in parts and $30 in labor;the P-2000 sells for $100 and has $20 in parts and $20 in labor;and the N-1000 sells for $75 but requires only $10 of parts and $10 of labor.Fixed overhead is estimated at $5,000 per week.The manufacture of each printer requires four machines,Machines #1,2,3 and 4.Each of the machines is available for 40 hours a week and there is no setup time required when shifting from the production of one product to any other.The processing requirements to make one unit of each product are shown in the table.Weekly product demand for the next planning period has been forecasted as follows: 80 E-1000s;65 S-2000s;35 P-2000s;and 20 N-1000s. In the questions that follow,the traditional method refers to maximizing the contribution margin per unit for each product,and the bottleneck method refers to maximizing the contribution margin per minute at the bottleneck for each product. -Use the information in Table 7.6.Using the bottleneck method,what is the optimal product mix?

Table 7.6 Burdell Industries makes four different models of computer printers: the E-1000,the S-2000,the P-2000 and the N-1000.The E-1000 sells for $200 and has $40 in parts and $40 in labor;the S-2000 sells for $150 and requires $30 in parts and $30 in labor;the P-2000 sells for $100 and has $20 in parts and $20 in labor;and the N-1000 sells for $75 but requires only $10 of parts and $10 of labor.Fixed overhead is estimated at $5,000 per week.The manufacture of each printer requires four machines,Machines #1,2,3 and 4.Each of the machines is available for 40 hours a week and there is no setup time required when shifting from the production of one product to any other.The processing requirements to make one unit of each product are shown in the table.Weekly product demand for the next planning period has been forecasted as follows: 80 E-1000s;65 S-2000s;35 P-2000s;and 20 N-1000s. In the questions that follow,the traditional method refers to maximizing the contribution margin per unit for each product,and the bottleneck method refers to maximizing the contribution margin per minute at the bottleneck for each product. -Use the information in Table 7.6.Using the traditional method,in what sequence should products be scheduled for production?

Table 7.1 The figure above shows the call routing process for a customer service call center.Incoming calls are routed,depending on the complexity of the caller's request.Simple request are routed to work center B,while the more complex calls are routed to work center C (which also takes simple calls when not busy).The numbers in parentheses are the time in minutes for each step of the process. -Use the information in Table 7.1.What is the throughput time for the process,assuming that the Call Center is always busy and has customers waiting to be processed?

The second step in Theory of Constraints application,"exploit the bottleneck(s)," means that the analyst should:

According to the Theory of Constraints,brand new cars on the lot waiting to be sold are ________,not ________.

Table 7.11 The Pennsylvania Appliance Company is installing an assembly line to produce vacuum cleaners,and you,as an operations manager,are responsible for balancing the line.The work elements to be performed are listed,along with their times and immediate predecessors. -Use the information in Table 7.11.The company is planning to operate 2 shifts per day 8 hours per shift.If the desired output rate of the line is 480 units per day,what is the highest efficiency possible for a balanced line?