Use Johnson's Rule to Determine the Optimal Sequencing for the Five

question 129

Essay

Use Johnson's rule to determine the optimal sequencing for the five jobs to be processed on two machines in a fixed order (Machine 1 before Machine 2). The processing times in hours are given in the table below.
a. What is the optimal sequence?
b. What is the total makespan for this sequence?
c. What is the total idle time for Machine 2?.
$$\begin{array} { | l | r | r | } \hline & \text { Machine 1 } & \text { Machine 2 } \\\hline \text { A } & 6 & 17 \\\hline \text { B } & 8 & 4 \\\hline \text { C } & 5 & 8 \\\hline \text { D } & 4 & 6 \\\hline \text { E } & 2 & 5 \\\hline\end{array}$$

---

Definitions:

NSF

An acronym standing for "Non-Sufficient Funds," indicating that a check cannot be honored due to inadequate funds in the payer's account.

Internal Control

Internal Control refers to the processes and procedures implemented by a company to ensure the integrity of financial and accounting information, promote accountability, and prevent fraud.

Task Responsibility

Assignment of accountability and authority to a person or team for the completion of a specific task or project component.

Segregation Of Duties

A control activity that aims to reduce the risk of errors and fraud by dividing responsibilities among different people in an organization.