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Is a Changeover Planned Downtime or an Availability Loss? — How the Definition Changes OEE
Whether a changeover (also called a setup) counts as planned downtime or as an availability loss differs from source to source, and because that choice alone changes availability and OEE substantially, changeover time must be tracked as a metric separate from OEE. The "Downtime" entry in the Lean Enterprise Institute (LEI) lexicon classifies changeovers to produce other products as planned downtime, while the Japan Institute of Plant Maintenance (JIPM) classifies setup and adjustment as a stop loss in availability. In an assumed shift (loading time 27,600 s, changeovers 3,000 s, breakdowns 600 s), availability is 87.0 % under the JIPM approach and 97.6 % under a planned-downtime approach that subtracts…
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The Equipment Maker’s Line-Ownership Shift — OEE and Takt-Time Design During the ESS-LFP New-Line Mass-Production Ramp-Up
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A 2.5 GWh Line Fed Only 1 GWh of Cells — OEE of 36.9% and 83.8% Describe the Same Line
Advait Group’s supply agreement with Hithium for 314 Ah LFP cells (up to 1 GWh over the next year, 18 September 2026) feeds a 2.5 GWh/yr assembly plant with only 40% of its design capacity. Under an assumed scenario, the same line with the same output reports an OEE of 36.9% if cell-shortage time is counted as availability loss, and 83.8% if it is separated as planned downtime and available operating time is matched to supply. The 46.9-point gap comes from the OEE denominator rule, not the equipment; on supply-constrained lines, the loading ratio should be reported alongside OEE.
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16 GWh committed and 190 GWh reserved — what absorbs the 2.97x step is the contract, not the line
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LFP High-Compaction-Density Conversion and the Calendering Interface: How Nip Pressure and Line Speed Affect Takt Time
