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Concerning workload control and order release: the pre-shop pool sequencing decision

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Concerning workload control and order release : the pre-shop pool sequencing decision. / Thurer, Matthias; Land, Martin; Stevenson, Mark; Fredendall, Lawrence; Filho, Moacir.

In: Production and Operations Management, Vol. 24, No. 7, 07.2015, p. 1179-1192.

Research output: Contribution to journalJournal article

Harvard

Thurer, M, Land, M, Stevenson, M, Fredendall, L & Filho, M 2015, 'Concerning workload control and order release: the pre-shop pool sequencing decision', Production and Operations Management, vol. 24, no. 7, pp. 1179-1192. https://doi.org/10.1111/poms.12304

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Thurer, Matthias ; Land, Martin ; Stevenson, Mark ; Fredendall, Lawrence ; Filho, Moacir. / Concerning workload control and order release : the pre-shop pool sequencing decision. In: Production and Operations Management. 2015 ; Vol. 24, No. 7. pp. 1179-1192.

Bibtex

@article{1490dfb1631a42aabc2cf22f376f2d8e,
title = "Concerning workload control and order release: the pre-shop pool sequencing decision",
abstract = "Every production planning concept that incorporates controlled order release will initially withhold jobs from the shop floor and create a pre-shop pool. Order release is a key component of the Workload Control concept that aims to maintain work-in-process within limits while ensuring due dates are met. Order release includes two decisions: (i) a sequencing decision that establishes the order in which jobs are considered for release; and, (ii) a selection decision that determines the criteria for choosing jobs for release. While selection has received much research attention, sequencing has been largely neglected. Using simulation, this study uncovers the potential for performance improvement in the sequencing decision and improves our understanding of how order release methods should be designed. Although most prior studies apply time-oriented sequencing rules and load-oriented selection rules, analysis reveals that load balancing considerations should also be incorporated in the sequencing decision. But an exclusive focus on load balancing is shown to increase mean tardiness and, paradoxically, require high workloads. A new sequencing rule is developed that only balances loads when multiple orders become urgent. It avoids high mean tardiness and allows the shop to operate at a low workload level. At the same time, the percentage tardy is reduced by up to 50% compared to a purely time-oriented rule. The findings have implications not only for Workload Control but for any concept that features order release control, such as ConWIP and Drum-Buffer-Rope.",
keywords = "order release, pre-shop pool sequencing rule, workload control, simulation",
author = "Matthias Thurer and Martin Land and Mark Stevenson and Lawrence Fredendall and Moacir Filho",
year = "2015",
month = jul,
doi = "10.1111/poms.12304",
language = "English",
volume = "24",
pages = "1179--1192",
journal = "Production and Operations Management",
issn = "1059-1478",
publisher = "Wiley-Blackwell",
number = "7",

}

RIS

TY - JOUR

T1 - Concerning workload control and order release

T2 - the pre-shop pool sequencing decision

AU - Thurer, Matthias

AU - Land, Martin

AU - Stevenson, Mark

AU - Fredendall, Lawrence

AU - Filho, Moacir

PY - 2015/7

Y1 - 2015/7

N2 - Every production planning concept that incorporates controlled order release will initially withhold jobs from the shop floor and create a pre-shop pool. Order release is a key component of the Workload Control concept that aims to maintain work-in-process within limits while ensuring due dates are met. Order release includes two decisions: (i) a sequencing decision that establishes the order in which jobs are considered for release; and, (ii) a selection decision that determines the criteria for choosing jobs for release. While selection has received much research attention, sequencing has been largely neglected. Using simulation, this study uncovers the potential for performance improvement in the sequencing decision and improves our understanding of how order release methods should be designed. Although most prior studies apply time-oriented sequencing rules and load-oriented selection rules, analysis reveals that load balancing considerations should also be incorporated in the sequencing decision. But an exclusive focus on load balancing is shown to increase mean tardiness and, paradoxically, require high workloads. A new sequencing rule is developed that only balances loads when multiple orders become urgent. It avoids high mean tardiness and allows the shop to operate at a low workload level. At the same time, the percentage tardy is reduced by up to 50% compared to a purely time-oriented rule. The findings have implications not only for Workload Control but for any concept that features order release control, such as ConWIP and Drum-Buffer-Rope.

AB - Every production planning concept that incorporates controlled order release will initially withhold jobs from the shop floor and create a pre-shop pool. Order release is a key component of the Workload Control concept that aims to maintain work-in-process within limits while ensuring due dates are met. Order release includes two decisions: (i) a sequencing decision that establishes the order in which jobs are considered for release; and, (ii) a selection decision that determines the criteria for choosing jobs for release. While selection has received much research attention, sequencing has been largely neglected. Using simulation, this study uncovers the potential for performance improvement in the sequencing decision and improves our understanding of how order release methods should be designed. Although most prior studies apply time-oriented sequencing rules and load-oriented selection rules, analysis reveals that load balancing considerations should also be incorporated in the sequencing decision. But an exclusive focus on load balancing is shown to increase mean tardiness and, paradoxically, require high workloads. A new sequencing rule is developed that only balances loads when multiple orders become urgent. It avoids high mean tardiness and allows the shop to operate at a low workload level. At the same time, the percentage tardy is reduced by up to 50% compared to a purely time-oriented rule. The findings have implications not only for Workload Control but for any concept that features order release control, such as ConWIP and Drum-Buffer-Rope.

KW - order release

KW - pre-shop pool sequencing rule

KW - workload control

KW - simulation

U2 - 10.1111/poms.12304

DO - 10.1111/poms.12304

M3 - Journal article

VL - 24

SP - 1179

EP - 1192

JO - Production and Operations Management

JF - Production and Operations Management

SN - 1059-1478

IS - 7

ER -