Identification and cost estimation of WIP bubbles in a fab

Michael Hassoun, Gad Rabinowitz, Shlomi Lachs

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We quantify the impact of work in process (WIP) bubbles on a semiconductor fab. As a preliminary step, we formalize the concept of WIP bubbles by decomposing them into local events of relatively acute and temporary WIP congestion. The local bubble is empirically identified and its impact on local waiting time distribution is assessed. We then estimate its marginal impact on the overall line waiting time and cost. Finally, a novel visualization tool for the bubble's progression is proposed.

Original languageEnglish
Article number4512065
Pages (from-to)217-222
Number of pages6
JournalIEEE Transactions on Semiconductor Manufacturing
Issue number2
StatePublished - May 2008
Externally publishedYes


  • Congestion
  • Production management
  • Semiconductors
  • Work-in-process


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