CASE SCENARIO: BRONSON CONSTRUCTION Bronson Construction must complete six road repair projects before winter weather ends...
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CASE SCENARIO: BRONSON CONSTRUCTION Bronson Construction must complete six road repair projects before winter weather ends the construction season. In each case, Bronson has been hired to remove an old road in a process known as milling, and then replace that road with new pavement. How much time is required to mill and then pave a certain road depends on how much of the old road needs removal, whether Bronson is allowed to completely close that road while working, and the total area of new paving. Based on these factors, Bronson has developed the following estimates for each of the six road repair projects: Milling (days) Paving (days) 7 1 5 7 6 3 4 4 Site A Site B Site C Site D Site E Site F Location Union Road Seneca Street Transit Road Bailey Avenue Main Street Losson Road 7 2 6 3 Bronson Construction has one milling operation and one paving operation avail- able to work on these six projects. Because Bronson Construction is worried about bad weather ending the construction season, the company intends to operate every day until these projects are completed. DETOUR Questions 1. Using Johnson's rule, determine the sequence in which Bronson Construction should complete the six road repair projects. 2. Prepare a Gantt chart illustrating this sequence. What is the makespan of this schedule? 3. If Bronson Construction started work tomorrow, when would the paving operation actually start work? After the paving operation starts work, how many days would that operation be idle during the time required to complete all the projects? 4. Bronson Construction is allowed to close Site F, Losson Road, while working at that site. Assuming that October 1st is the first day of work toward completing the entire schedule, when will Losson Road be closed and when will it reopen? CASE SCENARIO: BRONSON CONSTRUCTION Bronson Construction must complete six road repair projects before winter weather ends the construction season. In each case, Bronson has been hired to remove an old road in a process known as milling, and then replace that road with new pavement. How much time is required to mill and then pave a certain road depends on how much of the old road needs removal, whether Bronson is allowed to completely close that road while working, and the total area of new paving. Based on these factors, Bronson has developed the following estimates for each of the six road repair projects: Milling (days) Paving (days) 7 1 5 7 6 3 4 4 Site A Site B Site C Site D Site E Site F Location Union Road Seneca Street Transit Road Bailey Avenue Main Street Losson Road 7 2 6 3 Bronson Construction has one milling operation and one paving operation avail- able to work on these six projects. Because Bronson Construction is worried about bad weather ending the construction season, the company intends to operate every day until these projects are completed. DETOUR Questions 1. Using Johnson's rule, determine the sequence in which Bronson Construction should complete the six road repair projects. 2. Prepare a Gantt chart illustrating this sequence. What is the makespan of this schedule? 3. If Bronson Construction started work tomorrow, when would the paving operation actually start work? After the paving operation starts work, how many days would that operation be idle during the time required to complete all the projects? 4. Bronson Construction is allowed to close Site F, Losson Road, while working at that site. Assuming that October 1st is the first day of work toward completing the entire schedule, when will Losson Road be closed and when will it reopen?
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