Table J.17
A company must take on seven new projects. Each project has a planning stage and a design stage, and the planning stage must be completed before the design stage can begin. Also, two project teams are available to work on these projects: Team 1 works only on planning stages of projects, and Team 2 works only on design stages of projects. The times to complete the project stage, in days, are shown in the following table.

-Using the information in Table J.17 and Johnson's rule, what is the makespan for these seven jobs?
A) 58 days or greater
B) greater than or equal to 55 days but less than 58 days
C) greater than or equal to 52 days but less than 55 days
D) less than 52 days

Question

Table J.17
A company must take on seven new projects. Each project has a planning stage and a design stage, and the planning stage must be completed before the design stage can begin. Also, two project teams are available to work on these projects: Team 1 works only on planning stages of projects, and Team 2 works only on design stages of projects. The times to complete the project stage, in days, are shown in the following table.
 
-Using the information in Table J.17 and Johnson's rule, what is the makespan for these seven jobs?
A) 58 days or greater 
B) greater than or equal to 55 days but less than 58 days 
C) greater than or equal to 52 days but less than 55 days 
D) less than 52 days

Quizplus · Accepted Answer

Johnson's rule is a method used to minimize the makespan (the total time required to complete a group of jobs) in a two-machine flow shop scheduling problem. Without the specific details from Table J.17, we can't apply Johnson's rule directly. However, the correct answer to a question like this would typically require analyzing the table data to sequence the jobs optimally. Since we can't do that here, we can't provide a specific explanation based on the table's data. The choice is based on the format of the question rather than specific calculations.

Table J.17 A Company Must Take on Seven New Projects. Each Project