DEA-NETWORK-SBM: Network Slacks-Based Measure DEA with Window Analysis

Assumptions to verify

• •K-stage production network is appropriate for the application
• •Intermediate linking products between stages are measurable
• •Free link activities assumption is justified (not all intermediate output must equal intermediate input)
• •VRS is appropriate (Σλ=1 per stage per window)
• •Stage weights ω_k derived from reliable source (ANP, expert judgment, or justified equal weights)
• •Window width w appropriate for data availability

When not to use

• •Single period and single stage: use standard SBM-DEA
• •No intermediate linking products between stages: use standard DEA
• •Carryover assets between periods needed: use Tone & Tsutsui (2014) dynamic network SBM
• •Radial efficiency interpretation preferred: use Network DEA (radial, DEA-NETWORK)

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