We describe robust optimization procedures for controlling total completion time penalty plus crashing cost in projects with uncertain activity times. These activity times arise from an unspecified distribution within a family of distributions with known support, mean and covariance. We develop linear and linear-based decision rules for making decisions about activity start times and the crashi...

This paper presents a new multi-objective Time-Cost Trade-Off (TCTO) model for Critical Chain Project Management (CCPM) networks. The presented model helps crashing a project with little, or no, additional cost. As combinatorial optimization problems' finding optimal decisions are difficult and is time consuming; considering the number of possible permutations involved for TCTO optimization, th...

This article proposes a two-level fuzzy supply chain inventory model, in which single consignor delivers multiple items to the consignees with consignment stock agreement. The lead time is incorporated into model and considered variable for obtaining optimal replenishment decisions. In addition, crashing cost employed reduce duration. investigates four different cases under controllable analyze...

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Delays in completing the Kelapa Dua shop-house construction project at CV. Mentari permai is a problem that often arises and affects overall work. The purpose of this research to determine critical path, calculate costs incurred with duration initial accelerated work percentage achievement shop Mutia Enchantment Nature. To overcome these delays, several control methods are used management. Crit...

A multi item inventory model with demand dependent on unit price and leading time with limited storage space and set up cost is considered in this paper. The varying production and leading time crashing costs are considered to be continuous functions of unit price and leading time respectively. The model is solved using Karush Kuhn Tucker conditions approach with optimal order quantity, unit pr...

In this study, a contract for vertical and horizontal coordination is developed in which transportation mode and carbon emissions tax play a key role in determining the values of the contract parameters. The contract is designed for simultaneous coordination of cooperative advertising and periodic review replenishment decisions of a supplier and two competitive retailers. To obtain the optimal ...