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ARRANGING PRECAST PRODUCTION SCHEDULES USING

ARRANGING PRECAST PRODUCTION SCHEDULES USING GENETIC ALGORITHMS Chien-Ho Ko† Department of Civil Engineering, National Pingtung University of Science and Technology, Pingtung, 91201, TAIWAN +886-8-770-3202, Email: [email protected] Shu-Fan Wang Department of Industrial Engineering and Technology Management,

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Precast production scheduling using multi-objective ...

Jul 01, 2011  Highlights This research develops a multi-objective precast production scheduling model (MOPPSM). In the model, production resources and buffer size between stations are considered. A multi-objective genetic algorithm is then developed to search for optimum solutions with minimum makespan and tardiness penalties. The performance of the proposed model is validated by using five

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How to schedule a precast plant project? - Elematic ...

The precast plant project begins with a project launch meeting. Before equipment manufacturing starts, we need to be sure that it suits for the intended use and all technical details are in place; the production capacity, their feedings and even the equipment size. At this point you should provide the actual drawings of the future precast ...

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(PDF) Production Scheduling for Precast Plants using a ...

Jul 01, 2002  The typical production process in a precast factory consists of. the following sequence: 共 1 兲 mixing of concrete and moving of. concrete from a mixing center to molds; 共 2 兲 setting of ...

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(PDF) Precast production scheduling with genetic algorithms

A flow shop sequencing model (FSSM) that incorporates actual constraints encountered in practice is proposed for the difficult case of specialized precast production scheduling.

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Optimized flowshop scheduling for precast production ...

May 01, 2021  Precast production scheduling is a key issue in prefabricated construction. Process connection and blocking are two characteristics of the flowshop production of precast components; however, they have received little attention in research on production scheduling, which may prevent actual production from following optimized scheduling schemes.

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Production Scheduling for Precast Plants using a Flow Shop ...

Oct 20, 2000  Production scheduling under the specialized alternative has been found to be a difficult optimization problem if heterogeneous elements are involved. A flow shop sequencing model that incorporates actual constraints encountered in practice is proposed for this difficult case of precast production scheduling.

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GA-based decision support systems for precast production ...

Nov 01, 2010  The current production plans are based mostly on the rule of thumb, but the outcomes may not certainly reach their goals. Hence, proposing production schedules using systematic methods has become a main research task , , , . 4. Precast production modeling

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Optimized flowshop scheduling of multiple production lines ...

Dec 01, 2016  Based on the MP-FSM, optimized flowshop schedules of multiple production lines for precast production can be generated by using optimization algorithms. In the section, the principle for flowshop scheduling based on the MP-FSM is introduced and a scheduling approach by using GA is presented through a case study. 4.1.

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REDUCING PRECAST FABRICATION INVENTORY

crucial impact on throughput. In addition, precast production is a flowshop sequencing problem that can be solved using computational methods. Genetic algorithms have been proven a promising method for arranging precast production schedules (Chan and Hu

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Dynamic production scheduling model under due date ...

Jun 01, 2020  First, most of the studies that were conducted on PC production scheduling assume no uncertainty. Dawood (1995) developed a scheduling model for the precast industry using the heuristic job scheduling approach. Benjaoran et al. (2005) developed the genetic algorithm (GA)-based flowshop-scheduling model for bespoke precast production based on the number of molds.

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(PDF) Built Environment Project and Asset Management Lean ...

Ko, C.H. (2012), “ Arranging precast production schedules using demand variability ”, 20th Annual Conference of the International Group for Lean Construction , San Diego, CA .

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An integrated framework for reducing precast fabrication ...

loped framework is explained using a real precast produc-tion project. 2. Precast production process Precast fabrication can be divided into six steps: namely 1) mold assembly, 2) placement of reinforcement and all embedded parts, 3) concrete casting, 4) curing, 5) mold stripping, and 6) product finishing, as depicted in Fig. 1.

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Production Planning and Scheduling with Spreadsheets ...

Production Planning and Scheduling with Spreadsheets. This is an information resource to help you build production planning and scheduling systems with spreadsheets. Here you will find tutorials, templates and downloads that can be used for planning and scheduling of production and materials using Microsoft Excel.

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IGLC - Conference Papers

Arranging Precast Production Schedules Using Demand Variability Chien-Ho Ko Reducing Material Management Costs Through Lateral Transshipment Chien-Ho Ko A Brief History of the Concept of Waste in Production Lauri Koskela, Rafael Sacks and John Rooke

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ARRANGING WEEKLY WORK PLANS IN CONCRETE ELEMENT ...

precast production is a flowshop production. Moreover, production resources have a crucial impact on throughput. The objective of this study is to overcome the difficulties in arranging weekly work plans. To achieve the goal, precast production process is modelled. By considering the prefabricator’s objectives, a multi-

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IMPACT OF THE BUFFER SIZE ON PRECAST FABRICATION

Using precast components can reduce uncertainty during construction period since these components are prefabricated at the factory (Boyd et al. 2013). Precast fabricators deliver elements to a site according to its erection schedule. Making production plans is one of the most important tasks in precast manufacturing

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Optimization of Flow Shop Scheduling in Precast Concrete ...

Apr 23, 2021  The production scheduling of precast components can be abstracted as flow shop sequencing. In this process, m machines arranged in sequence on the assembly line are used to produce n types of components. The production schedule presents the work to be performed and the timeframes in which the work must be completed.

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PRECAST CONCRETE MANHOLES

Using an allowable concrete stress of 45% of the minimum specified compressive strength of 4,000 psi, the allowable compressive stress would be 1,800 psi. Substituting this value for s yields the following: = 3.4 s H 1,800 = 3.4H then H = 530 feet The above example illustrates that precast concrete manhole

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[PDF] Precast Production Scheduling Using Genetic ...

The goal of production scheduling is to strike a profitable balance among on-time delivery, short customer lead time, and maximum utilization of resources. A good one will bring company the most effective utilization of resources and reduce wastes. However, current practices in precast fabrication are fairly basic and depend greatly on experience, resulting inefficient resource utilization and ...

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PAPER OPEN ACCESS Scheduling the Production of Precast ...

Scheduling the Production of Precast Concrete Elements Using the Simulated Annealing Metaheuristic Algorithm Michal Podolski 1, Mariusz Rejment 1 1 Faculty of Civil Engineering, Wrocław University of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland [email protected] Abstract.

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Production Scheduling for Precast Plants using a Flow Shop ...

Oct 20, 2000  Production scheduling under the specialized alternative has been found to be a difficult optimization problem if heterogeneous elements are involved. A flow shop sequencing model that incorporates actual constraints encountered in practice is proposed for this difficult case of precast production scheduling.

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(PDF) Production Scheduling for Precast Plants using a ...

Jul 01, 2002  The typical production process in a precast factory consists of. the following sequence: 共 1 兲 mixing of concrete and moving of. concrete from a mixing center to molds; 共 2 兲 setting of ...

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Optimization of precast production scheduling for rail ...

Design, production and installation of track slabs are critical technologies of high-speed rail which has become an important trend of the transportation development across the world. This paper mainly investigates the scheduling arrangements and optimization of precast production of track slabs. A Flow-Shop Multi-Objective Optimization Scheduling Model (FSMSM) has been developed and solved

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Reducing Finished Goods Inventory for Precast Fabricators

on throughput. In addition, precast production is a flowshop sequencing problem that can be solved using computational methods. Genetic algorithms have been proven a promising method for arranging precast production schedules (Chan and Hu, 2002; Leu and Hwang, 2001; Leu and Hwang, 2002; Benjaoran et al., 2005; Vern K and Gunal, 1998). This study

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IMPACT OF THE BUFFER SIZE ON PRECAST FABRICATION

Using precast components can reduce uncertainty during construction period since these components are prefabricated at the factory (Boyd et al. 2013). Precast fabricators deliver elements to a site according to its erection schedule. Making production plans is one of the most important tasks in precast manufacturing

Get Price

Flowshop scheduling model for bespoke precast concrete ...

Bespoke precast concrete products are particularly designed and custom made for a construction project. The production planning of these products is complicated that considers important concerns, i.e. the reliability of the product delivery programme, the short lead-time competitiveness, and the effective utilization of purpose-built precast moulds.

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An integrated framework for reducing precast fabrication ...

loped framework is explained using a real precast produc-tion project. 2. Precast production process Precast fabrication can be divided into six steps: namely 1) mold assembly, 2) placement of reinforcement and all embedded parts, 3) concrete casting, 4) curing, 5) mold stripping, and 6) product finishing, as depicted in Fig. 1.

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PRECAST CONCRETE MANHOLES

Using an allowable concrete stress of 45% of the minimum specified compressive strength of 4,000 psi, the allowable compressive stress would be 1,800 psi. Substituting this value for s yields the following: = 3.4 s H 1,800 = 3.4H then H = 530 feet The above example illustrates that precast concrete manhole

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Chien-Ho KO Doctor of Philosophy Clemson University ...

Arranging precast production schedules using demand variability. Article. Jan 2012; Chien-Ho Ko. Demand variability is the biggest headache for fabricators. The objective of this research is to ...

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BIM software for precast element planning Timwork by ...

Software for 3D operations scheduling and BIM-Management. Successful precast element planning requires the perfect operations scheduling and quality-assured data for production, commercial systems and BIM applications. We developed our future-proof solution Tim work to meet this need. Timwork assists in numerous routine tasks, helps eliminate ...

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(PDF) Development of an artificial intelligence planner ...

PP searches through possible schedules and selects the optimal or near optimal one out of them. Finally, PP gives the result with the production schedule. CONCLUSIONThis paper has presented the precast concrete production process particularly focusing on product design and production planning, and the problem of long customer lead-time.

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AN APPLICATION OF ARTIFICIAL INTELLIGENCE PLANNER FOR ...

496 An application of Artificial Intelligence Planner for bespoke precast concrete production planning: a case study Delivery Schedule Production Scheduling PS Productivity Estimation Central Bespoke Precast Manufacturing Database Products' due-dates Estimated processing time Optimum job sequence GA based Optimization Flowshop Scheduling Models ...

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