Skip to main content
Top

2016 | OriginalPaper | Chapter

5. Drum, Buffer, Rope and Days of Inventory (DOI) Control

Authors : Gilad Issar, Liat Ramati Navon

Published in: Operational Excellence

Publisher: Springer International Publishing

Activate our intelligent search to find suitable subject content or patents.

search-config
loading …

Abstract

The theory of Constraint (Goldratt, The goal: A process of ongoing improvement, 1992) is subordinating the production line input and output material to the line bottleneck/constraint capacity. The line inventory in days (DOI), is optimized by using the TOC rules. The constraint’s daily output, the line’s Drum Beat, defines the amount of raw material which enters the line. Connecting the beginning of the line with a theoretical “rope” to the line’s constraint, with same Drum Beat- the same amount of material, governs the line entrance through the constraint. In order to secure the continuous feeding of the constraint, a buffer, a few days of work in process, is kept a step or two ahead of the constraint.

Dont have a licence yet? Then find out more about our products and how to get one now:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

  • über 102.000 Bücher
  • über 537 Zeitschriften

aus folgenden Fachgebieten:

  • Automobil + Motoren
  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Elektrotechnik + Elektronik
  • Energie + Nachhaltigkeit
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Maschinenbau + Werkstoffe
  • Versicherung + Risiko

Jetzt Wissensvorsprung sichern!

Springer Professional "Wirtschaft"

Online-Abonnement

Mit Springer Professional "Wirtschaft" erhalten Sie Zugriff auf:

  • über 67.000 Bücher
  • über 340 Zeitschriften

aus folgenden Fachgebieten:

  • Bauwesen + Immobilien
  • Business IT + Informatik
  • Finance + Banking
  • Management + Führung
  • Marketing + Vertrieb
  • Versicherung + Risiko




Jetzt Wissensvorsprung sichern!

Footnotes
1
DOI Calculation
Quarterly DOI = Inventory/Cost of Goods Sold * 90 (days)
For calculation the annual DOI, 90 days can be replaced by 360 days and the COGs needs to be the total yearly COGs.
 
Literature
go back to reference Goldratt, E. M. (1992). The goal: A process of ongoing improvement. Croton-on-Hudson, NY: North River Press. Goldratt, E. M. (1992). The goal: A process of ongoing improvement. Croton-on-Hudson, NY: North River Press.
Metadata
Title
Drum, Buffer, Rope and Days of Inventory (DOI) Control
Authors
Gilad Issar
Liat Ramati Navon
Copyright Year
2016
DOI
https://doi.org/10.1007/978-3-319-20699-8_5