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26. Two brothers have purchased a small lot, in the center of town, where they intend to build a gas station. The station will have two pumps, a service area for water and tire maintenance, and a main building with restrooms, office, and cash register area. Before they begin excavating the site, the local authorities must approve the location for a gasoline station and be certain that the placement of the storage tanks will not interfere with water, gas, and electric lines that are already in place. Once the site has been approved, the excavation can begin. After excavation, the three primary parts of the construction can begin: laying in the gasoline tanks, building the water and tire service area (including installation of the air compressor), and constructing the main building. The surfacing can begin after all building is completed. After surfacing, the site must be cleaned and the station's signs erected. However, before the station can open for business, the air compressor must be inspected, tested, and approved. The activities and the time required for each of them are as follows: Activity Time Required (weeks) A: Obtain site approval B: Begin site excavation C: Place and secure gasoline tanks D: Install gasoline pumps E: Connect and test gasoline pumps F: Construct service area G: Install and connect water and 4 2 1 1 air compressor H: Test compressor I: Construct main building including the restrooms, the office, and the cash register area J: Install plumbing and electrical connections in the main building K: Cover tanks and surface the area L: Clean site 1 5 3 4 M: Erect station signs 1

26. Two brothers have purchased a small lot, in the center of town, where they intend to build a gas station. The station will have two pumps, a service area for water and tire maintenance, and a main building with restrooms, office, and cash register area. Before they begin excavating the site, the local authorities must approve the location for a gasoline station and be certain that the placement of the storage tanks will not interfere with water, gas, and electric lines that are already in place. Once the site has been approved, the excavation can begin. After excavation, the three primary parts of the construction can begin: laying in the gasoline tanks, building the water and tire service area (including installation of the air compressor), and constructing the main building. The surfacing can begin after all building is completed. After surfacing, the site must be cleaned and the station's signs erected. However, before the station can open for business, the air compressor must be inspected, tested, and approved. The activities and the time required for each of them are as follows: Activity Time Required (weeks) A: Obtain site approval B: Begin site excavation C: Place and secure gasoline tanks D: Install gasoline pumps E: Connect and test gasoline pumps F: Construct service area G: Install and connect water and 4 2 1 1 air compressor H: Test compressor I: Construct main building including the restrooms, the office, and the cash register area J: Install plumbing and electrical connections in the main building K: Cover tanks and surface the area L: Clean site 1 5 3 4 M: Erect station signs 1

Practical Management Science
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter5: Network Models
Section5.5: Shortest Path Models
Problem 37P
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b. Determine the critical path and the earliest and the latest starting and finishing
times for each activity.

26. Two brothers have purchased a small lot, in the center of town, where they intend to build a gas station. The station will have two pumps, a service area for water and tire maintenance, and a main building with restrooms, office, and cash register area. Before they begin excavating the site, the local authorities must approve the location for a gasoline station and be certain that the placement of the storage tanks will not interfere with water, gas, and electric lines that are already in place. Once the site has been approved, the excavation can begin. After excavation, the three primary parts of the construction can begin: laying in the gasoline tanks, building the water and tire service area (including installation of the air compressor), and constructing the main building. The surfacing can begin after all building is completed. After surfacing, the site must be cleaned and the station's signs erected. However, before the station can open for business, the air compressor must be inspected, tested, and approved. The activities and the time required for each of them are as follows: Activity Time Required (weeks) A: Obtain site approval B: Begin site excavation C: Place and secure gasoline tanks D: Install gasoline pumps E: Connect and test gasoline pumps F: Construct service area G: Install and connect water and 4 2 1 1 air compressor H: Test compressor I: Construct main building including the restrooms, the office, and the cash register area J: Install plumbing and electrical connections in the main building K: Cover tanks and surface the area L: Clean site 1 5 3 4 M: Erect station signs 1
Transcribed Image Text:26. Two brothers have purchased a small lot, in the center of town, where they intend to build a gas station. The station will have two pumps, a service area for water and tire maintenance, and a main building with restrooms, office, and cash register area. Before they begin excavating the site, the local authorities must approve the location for a gasoline station and be certain that the placement of the storage tanks will not interfere with water, gas, and electric lines that are already in place. Once the site has been approved, the excavation can begin. After excavation, the three primary parts of the construction can begin: laying in the gasoline tanks, building the water and tire service area (including installation of the air compressor), and constructing the main building. The surfacing can begin after all building is completed. After surfacing, the site must be cleaned and the station's signs erected. However, before the station can open for business, the air compressor must be inspected, tested, and approved. The activities and the time required for each of them are as follows: Activity Time Required (weeks) A: Obtain site approval B: Begin site excavation C: Place and secure gasoline tanks D: Install gasoline pumps E: Connect and test gasoline pumps F: Construct service area G: Install and connect water and 4 2 1 1 air compressor H: Test compressor I: Construct main building including the restrooms, the office, and the cash register area J: Install plumbing and electrical connections in the main building K: Cover tanks and surface the area L: Clean site 1 5 3 4 M: Erect station signs 1
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