Journal
INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH
Volume 46, Issue 23, Pages 6567-6584Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00207540802230058
Keywords
Leanness measure; Data envelopment analysis; Slacks-based measure; Lean manufacturing
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Various lean tools and techniques have been developed for process improvement. In order to track the progress, lean metrics were developed correspondingly. However, an integrated and quantitative measure of overall leanness level has not been established. This paper proposes a unit-invariant leanness measure with a self-contained benchmark to quantify the leanness level of manufacturing systems. Evolved from the concept of data envelopment analysis (DEA), the leanness measure extracts the value-adding investments from a production process to determine the leanness frontier as a benchmark. A linear program based on slacks-based measure (SBM) derives the leanness score that indicates how lean the system is and how much waste exists. Using the score, impacts of various lean initiatives can be quantified as decision support information complementing the existing lean metrics.
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