Chapter C, Problem 3P

To determine

Concept introduction:

Cycle efficiency:

Cycle efficiency denotes about the use of cycle time in value-added activities. In other words, we can say that cycle efficiency shows relationship between value-added time and cycle time. On the basis of cycle efficiency we know about the use of whole cycle time in the value-added activities.

Requirement 1:

Non-value-added time under the traditional manufacturing process.

Answer to Problem 3P

$\begin{array}{l}\text{Non-value-added time = 4 + 6 + 2}\\ \text{= 12 hours}\end{array}$

Explanation of Solution

$\begin{array}{l}\text{Non-value-added time = Inspection time + Move time + Wait time}\\ \text{Inspection time = 2 hours}\\ \text{Move time = 6 hours}\\ \text{Wait time = 2 hours}\\ \text{Now, let's put the values in above given formula;}\\ \text{Non-value-added time = 4 + 6 + 2}\\ \text{= 12 hours}\end{array}$

To determine

Concept introduction:

Cycle efficiency:

Cycle efficiency denotes about the use of cycle time in value-added activities. In other words, we can say that cycle efficiency shows relationship between value-added time and cycle time. On the basis of cycle efficiency, we know about the use of whole cycle time in the value-added activities.

Requirement 2:

Cycle efficiency under the traditional manufacturing process.

Answer to Problem 3P

$\begin{array}{l}\text{Cycle efficiency = }\frac{24}{36}\\ =\text{ 0}\text{.67}\end{array}$

Explanation of Solution

$\begin{array}{l}\text{Cycle efficiency = }\frac{\text{Value-added time}}{\text{Cycle time}}\\ \\ \text{Value-added time = Process time }\\ \text{Hence, value-added time = 24 hours}\\ \text{Cycle time = Process time + Inspection time + Move time + Wait time}\\ \text{Cycle time = 24 + 4 + 6 + 2 }\\ =\text{ 36 hours}\\ \text{Now, let's put the values in above given formula;}\\ \text{Cycle efficiency = }\frac{24}{36}\\ =\text{ 0}\text{.67}\end{array}$

To determine

Concept introduction:

Cycle efficiency:

Cycle efficiency denotes about the use of cycle time in value-added activities. In other words, we can say that cycle efficiency shows relationship between value-added time and cycle time. On the basis of cycle efficiency, we know about the use of whole cycle time in the value-added activities.

Requirement 3:

Non-value-added time under the proposed lean manufacturing process.

Answer to Problem 3P

$\begin{array}{l}\text{Non-value-added time = 4 + 3 + 1}\\ \text{= 8 hours}\end{array}$

Explanation of Solution

$\begin{array}{l}\text{Non-value-added time = Inspection time + Move time + Wait time}\\ \text{Inspection time = 4 hours}\\ \text{Move time = 3 hours}\\ \text{Wait time = 1 hours}\\ \text{Now, let's put the values in above given formula;}\\ \text{Non-value-added time = 4 + 3 + 1}\\ \text{= 8 hours}\end{array}$

To determine

Concept introduction:

Cycle efficiency:

Cycle efficiency denotes about the use of cycle time in value-added activities. In other words, we can say that cycle efficiency shows relationship between value-added time and cycle time. On the basis of cycle efficiency, we know about the use of whole cycle time in the value-added activities.

Requirement 4:

Cycle efficiency under the proposed lean manufacturing process.

Answer to Problem 3P

$\begin{array}{l}\text{Cycle efficiency = }\frac{24}{32}\\ =\text{ 0}\text{.75}\end{array}$

Explanation of Solution

$\begin{array}{l}\text{Cycle efficiency = }\frac{\text{Value-added time}}{\text{Cycle time}}\\ \\ \text{Value-added time = Process time }\\ \text{Hence, value-added time = 24 hours}\\ \text{Cycle time = Process time + Inspection time + Move time + Wait time}\\ \text{Cycle time = 24 + 4 + 3 + 1 }\\ =\text{ 32 hours}\\ \text{Now, let's put the values in above given formula;}\\ \text{Cycle efficiency = }\frac{24}{32}\\ =\text{ 0}\text{.75}\end{array}$

To determine

Concept introduction:

Cycle efficiency:

Cycle efficiency denotes about the use of cycle time in value-added activities. In other words, we can say that cycle efficiency shows relationship between value-added time and cycle time. On the basis of cycle efficiency we know about the use of whole cycle time in the value-added activities.

Requirement 5:

Would the proposed lean approach improve cycle efficiency?

Answer to Problem 3P

Yes, the proposed lean approach would improve cycle efficiency.

Explanation of Solution

$\begin{array}{l}\text{Cycle efficiency under the traditional manufacturing process = }\frac{24}{36}\\ =\text{ 0}\text{.67}\\ \\ \text{Cycle efficiency under the proposed lean manufacturing process = }\frac{24}{32}\\ =\text{ 0}\text{.75}\\ \text{Thus, it is clear that the proposed lean approach would improve cycle efficiency }\\ \text{because cycle efficiency is higher under proposed lean approach}\text{.}\end{array}$