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This article assumes that you are an advanced user and have a high proficiency in both data analysis and manufacturing metrics.

A refresher on Scheduled vs. Unscheduled

Almost all production occurs in “Scheduled Time” – the time during a shift.

OEE and its components (Availability, Performance, Quality) are all based on scheduled time, whereas OEE Capacity (OEEc) treats unscheduled time as a relevant factor to OEE. In your circumstance this may yield useful insights.

  • Further discussion of OEE can be found in PowerPoint below and other Shoplogix documentation.

[STEVEN: pretty pictures here}

How to calculate OEEc

To use capacity fields in Shoplogix Analytics find the “C” suffixed fields.

These OEE and OEEc formulas are filtered formulas (right click → Use Flattened Form for more details) so the Is Scheduled field doesn't impact them if used as a filter.

{STEVEn: include screenshot of the formula editor and Flattened Form before / after}

Filtering can strongly impact OEE and should be carefully applied. Filters like Machine and Plant can be useful.

Carefully apply filters, like State Type, because OEE will remove those components from the calculation and provide non-standard OEE results.

{SCREENSHOT EXAMPLE

If filtering something like State Type (EXAMPLE SCREENSHOT), the OEE and OEEc WILL LIKELY BE INACCURATE}

Production during unscheduled time is usually unexpected or unwanted when determining efficiency. Some reasons production can occur in unscheduled time include:

  • Maintenance - testing machine production.

  • Unexpected overtime - working continuing past a shift.

  • Automatic thresholds, if configured (“2 hours of no production”) can put a shift into unscheduled.

  • Special cases around line production.

  • Some sources of problematic Unscheduled Production are:

    • Bad shift schedule (configuration issue)

    • Excessive use of downtime reasons with “Capacity” type.

To identify if you have problems with this, try using the UnscheduledTime dashboard below. Import it to your analytics as a starting point for your analysis.

Unscheduled Time Dashboard:

OEE:

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