Question 1

For the purposes of assembly-line balancing, the required workstation cycle time is found by dividing production time per day by the required units of output per day.

Accepted Answer

The workstation cycle time is calculated by dividing the total available production time per day by the number of units that need to be produced, ensuring each workstation can meet the production demand.

Question 2

In balancing an assembly line, workstation cycle time has to be less than the time between successive units coming off the end of the line.

Accepted Answer

In balancing an assembly line, workstation cycle time has to be equal to or less than the time between successive units coming off the end of the line to ensure a smooth and continuous production flow without bottlenecks or idle time.

Question 3

A process map shows the physical location of the various processes within a supply chain.

Accepted Answer

A process map visually represents the steps or activities in a process, not the physical locations within a supply chain.

Question 4

Using the assembly-line balancing procedure, which of the following is the required cycle time in minutes per unit if the daily production time is 480 minutes and the required daily output is 50 units?

Accepted Answer

The cycle time is calculated by dividing the total available production time by the required output. So, 480 minutes / 50 units = 9.6 minutes per unit.

Question 5

Little's law states that supply chain processes can be regarded as unrelated and thus treated and analyzed separately.

Accepted Answer

Little's Law actually states that the average number of items in a queuing system is equal to the average arrival rate multiplied by the average time an item spends in the system. It does not suggest that supply chain processes are unrelated.

Question 6

Workstation cycle time is the time between successive units coming off the end of the assembly line.

Accepted Answer

Workstation cycle time refers to the time interval between the completion of one unit and the start of the next unit in an assembly line, indicating the pace of production.

Question 7

Using the assembly-line balancing procedure, which of the following is the required cycle time if the production time in minutes per day is 1,440 and the required output per day in units is 2,000?

Accepted Answer

The cycle time is calculated by dividing the total production time by the required output. Thus, 1,440 minutes / 2,000 units = 0.72 minutes per unit.

Question 8

The assembly-line balancing procedure determines the precedence relationships of manufacturing tasks.

Accepted Answer

The assembly-line balancing procedure is primarily focused on distributing tasks among workstations in a way that each has an approximately equal amount of work, not on determining the precedence relationships of manufacturing tasks. Precedence relationships, which dictate the order in which tasks must be performed, are typically established before the balancing process.

Question 9

If the sum of the task times required to produce a product is 45 minutes and the cycle time for the same product is 10 minutes. Thus, the theoretical minimum number of workstations is 5 using the assembly-line balancing procedure.

Accepted Answer

The theoretical minimum number of workstations is calculated by dividing the total task time by the cycle time. In this case, 45 minutes divided by 10 minutes equals 4.5, which is rounded up to 5 workstations.

Question 10

A high-level map or diagram of a supply chain process can be useful to understand how material flows and where inventory is held.

Accepted Answer

A high-level map or diagram of a supply chain process can provide a visual representation of the flow of materials and the locations of inventory, making it easier to understand and optimize the process.

Question 11

Little's law can be thought of as a relationship between units and time.

Accepted Answer

Little's Law states that the average number of items in a queuing system (L) is equal to the average arrival rate (λ) multiplied by the average time an item spends in the system (W), which relates units (L) and time (W).

Question 12

Using the assembly-line balancing procedure, which of the following is the theoretical minimum number of workstations if the task times for the six tasks that make up the job are 4, 6, 7, 2, 6, and 5 minutes, and the cycle time is 10 minutes?

Accepted Answer

The answer of Using the assembly-line balancing procedure, which of...

Question 13

In designing a production layout a flexible line layout might have the shape of a "U".

Accepted Answer

A flexible line layout allows for various products to be produced on the same line with minimal setup changes. The U shape allows for easy movement of materials and products, as well as easier access for operators.

Question 14

Assembling-to-order means moving the customer order decoupling point from finished goods to components.

Accepted Answer

Assembling-to-order is a strategy in which a company builds a product based on the customer's specific order, moving the customer order decoupling point from finished goods to components.

Question 15

The efficiency of an assembly-line is found by a ratio of the sum of all task times divided by the cycle time.

Accepted Answer

The efficiency of an assembly line is found by dividing the sum of all task times by the product of the cycle time and the number of workstations.

Question 16

In assembly-line balancing the theoretical minimum number of workstations is found by a ratio of the sum of all task times divided by the cycle time.

Accepted Answer

This is correct according to the formula for calculating the minimum number of workstations in assembly-line balancing, which is CT/T where CT is the cycle time and T is the sum of all task times.

Question 17

If the sum of the task times required to produce a product is 80 minutes and the cycle time for the same product is 15 minutes, the theoretical minimum number of workstations is 8 using the assembly-line balancing procedure.

Accepted Answer

The theoretical minimum number of workstations can be calculated using the formula:

Number of workstations = Total task time / Cycle time

In this case, the total task time is given as 80 minutes and the cycle time is 15 minutes. So,

Number of workstations = 80 / 15
Number of workstations = 5.33

This means that the theoretical minimum number of workstations required is 5.33, which is not a whole number. Therefore, the correct answer is B, false. It is not possible to have 8 workstations using the assembly-line balancing procedure based on the given data.

Question 18

Using the assembly-line balancing procedure, which of the following is the theoretical minimum number of workstations if the task times for the eight tasks that make up the job are 7, 4, 7, 8, 9, 4, 3, and 6 minutes, and the cycle time is 8 minutes?

Accepted Answer

The assembly-line balancing procedure aims to minimize the number of workstations needed to complete a task while maintaining the cycle time. The theoretical minimum number of workstations is found by dividing the sum of the task times by the cycle time and rounding up to the nearest integer.

In this case, the sum of task times is: 7 + 4 + 7 + 8 + 9 + 4 + 3 + 6 = 48 minutes

Dividing by the cycle time of 8 minutes gives: 48/8 = 6

Therefore, the theoretical minimum number of workstations is 6.

Question 19

The term "assembly line" refers to progressive assembly linked by some material handling device.

Accepted Answer

The definition of the term "assembly line" is a progressive assembly process that is linked by some material handling device such as a conveyor belt or automated system.

Question 20

The first step in balancing an assembly line is to specify the precedence relationships among tasks to be performed on the line.

Accepted Answer

Specifying precedence relationships is essential in determining the sequence of tasks to be performed on the assembly line, and in turn, helps in balancing the line.

Quiz 6: Manufacturing Processes