Consider the Periodic VRP formulation. Modify the model to satisfy the following restrictions. (Hint: Y' 7+1 1

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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M3
Consider the Periodic VRP formulation. Modify the
model to satisfy the following restrictions. (Hint:
Xijkd=1 if vehicle k goes to node j from node i on
day d. 0, ow.)
a. If vehicle k=1 visits customer j=2 on day d=3,
then vehicle k=1 returns directly to the depot (node
1) immediately after customer j=2 on day d=4.
b. At least 70 percent of the total customer
demands must be met. (pj is the demand of
customer j.)
c. If vehicle k visits node j on day d, then vehicle k
leaves node j on day d or d+1. (Assume that
vehicles do not need to be in service on last day.)
Transcribed Image Text:Consider the Periodic VRP formulation. Modify the model to satisfy the following restrictions. (Hint: Xijkd=1 if vehicle k goes to node j from node i on day d. 0, ow.) a. If vehicle k=1 visits customer j=2 on day d=3, then vehicle k=1 returns directly to the depot (node 1) immediately after customer j=2 on day d=4. b. At least 70 percent of the total customer demands must be met. (pj is the demand of customer j.) c. If vehicle k visits node j on day d, then vehicle k leaves node j on day d or d+1. (Assume that vehicles do not need to be in service on last day.)
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