Impact of Activity Sequencing on Reducing Variability

Søren Munch Lindhard, Farook Hamzeh, Vicente A. Gonzalez, Søren Wandahl, Lene Faber Ussing

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Variation in production is a major cause of producing waste in onsite construction operations, resulting in a workflow that is full of delays and interruptions. To reduce the negative impact of waste in construction, production managers need to address the causes of the variation that results in such waste. This paper explains the way to reduce the effects of variation in construction by changing the task sequence arrangement. The study analyzed the effect of some different task sequence arrangements on the production gap, crew waiting time, and production delay by simulating a group of work tasks and changing the task sequence arrangement from linear to parallel. Accordingly, 100 work activities were simulated in 98 different sequence designs, using a stochastic discrete-event simulation model, during which the number of parallel activities was systematically increased. The main finding from the studied configuration is that arranging tasks in parallel increases waste, whereas it reduces project duration. Moreover, waste resulting from variation was found to be an additional cause of waste when accelerating the production. Finally, it was revealed that the impact of variation on the task sequence highly depends on how often the schedule is updated. This study helps production managers to better understand of how the task sequence arrangement affects production performance in onsite construction operations.

OriginalsprogEngelsk
Artikelnummer04019001
TidsskriftJournal of Construction Engineering and Management
Vol/bind145
Udgave nummer3
Antal sider9
ISSN0733-9364
DOI
StatusUdgivet - 2019

Fingerprint

Managers
Discrete event simulation
Sequencing
Construction operations
Interruption
Simulation model
Schedule
Waiting time

Emneord

  • Waste management
  • Stochastic processes
  • Managers
  • Construction wastes
  • Industrial wastes
  • Construction management
  • Linear analysis
  • Simulation models

Citer dette

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abstract = "Variation in production is a major cause of producing waste in onsite construction operations, resulting in a workflow that is full of delays and interruptions. To reduce the negative impact of waste in construction, production managers need to address the causes of the variation that results in such waste. This paper explains the way to reduce the effects of variation in construction by changing the task sequence arrangement. The study analyzed the effect of some different task sequence arrangements on the production gap, crew waiting time, and production delay by simulating a group of work tasks and changing the task sequence arrangement from linear to parallel. Accordingly, 100 work activities were simulated in 98 different sequence designs, using a stochastic discrete-event simulation model, during which the number of parallel activities was systematically increased. The main finding from the studied configuration is that arranging tasks in parallel increases waste, whereas it reduces project duration. Moreover, waste resulting from variation was found to be an additional cause of waste when accelerating the production. Finally, it was revealed that the impact of variation on the task sequence highly depends on how often the schedule is updated. This study helps production managers to better understand of how the task sequence arrangement affects production performance in onsite construction operations.",
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Impact of Activity Sequencing on Reducing Variability. / Lindhard, Søren Munch; Hamzeh, Farook; Gonzalez, Vicente A.; Wandahl, Søren; Ussing, Lene Faber.

I: Journal of Construction Engineering and Management, Bind 145, Nr. 3, 04019001, 2019.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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