OEE Retrieval Prerequisites

There are a few simple tasks you need to perform before you can retrieve meaningful OEE (Overall Equipment Effectiveness) data.

Be sure to complete each of these detailed in this topic.

1. Designate OEE traceability fields

Before drawing OEE charts, you will need to designate five new traceability fields (columns) in which to store the raw data values used to determine your OEE.

See Adding traceability field labels

1. Select five consecutive traceability fields (for example, fields 6–10) that are not previously used, and

2. Assign a label to each of those traceability fields in this order:

Available Time
Scheduled Time
#Good Parts
#Total Parts
Ideal Cycle Time

2. Change an OEE Statistic setting in the GainSeeker System Administration module

After you have designated the new OEE traceability fields (columns) as detailed in step 1. above, you will need to set the First of five traceability columns where OEE values are stored = setting.

1. Follow this path on the GainSeeker System Administration module to access the setting:
   
   Configurations tab | configuration name | Statistics | OEE | First of five traceability columns where OEE values are stored =

2. Right-click the setting to open the OEE Data Columns dialog.  
   
   The default setting is Not set; OEE calculations are disabled.
   
   

3. To enable OEE calculations for your data, select the Available Time traceability label (you added in step 1 above) from the drop-down list. Then, click OK.
   
   

3. Select the start of work day time and shift sequence

You can group data for OEE charts (and DPU charts) by work shifts within a specified 24-hour period for up to three shifts: three 8-hour shifts, two 12-hour shifts, or one 24-hour "shift."

The Shift Sequence= and Start of work day= settings are to used to determine how GainSeeker groups your data for your typical workday.

It is important that you use these settings to keep your data associated with the correct workday, especially if any of your shifts span two days (for example, if your Shift3 starts at 11pm and ends 7am the following day).

• See setting Shift Sequence

4. Select a default time increment or traceability by which to group data

You can group data on OEE charts (and DPU charts) by one of many time increments or traceabilities, including shift, which groups shift data by day.

• See Group data by (OEE charts)

5. Enter OEE Data

Use one of the many GainSeeker data entry options - PC Collect, SPC Data Entry, DMS Data Entry, etc. - to enter OEE data for analysis.

The OEE data you enter must meet the following requirements:

• Stored as DMS data records (not SPC data)

• Important data fields are the Date/Time stamp and the new traceability fields you added (above):

• • Date/Time stamp:  
    
    This relates to the frequency of data collection and determines the smallest unit of time that you can use for comparing OEE values - every 5 minutes, every 30 minutes, every hour, every day, etc.  
    
    For example: if you want the ability to calculate separate OEE numbers for increments as small as every 30 minutes, then you need to enter data records that are timestamped 30 minutes apart.
    
    Also, each timestamp should fall within the time period it represents - e.g., for OEE data from 10:00:00 - 10:30:00, the data record should be timestamped between 10:00:00 and 10:29:59.

  • New traceability fields:

  • • Available Time: The actual operating time in minutes that the process was in operation. For example, 5 hours would be 300 minutes.

    • Scheduled Time: The total number of minutes that production is scheduled. For example, 8 hours would be 480 minutes.

    • #Good Parts: The number of parts that were produced without defects (first-pass yield).

    • #Total Parts: The total number of parts produced within the set time period (good parts and bad parts).

    • Ideal Cycle Time: The number of minutes to produce one part at the ideal rate. For example: if your Ideal Cycle Time (ICT) is to produce 240 parts per hour, which is 4 parts per minute, or 1 part every 15 seconds, then your ICT would be 0.25 minutes per part.

  • Other traceability fields:
    
    In addition to the new traceability fields you added (above), you can also store additional traceability data in these OEE data records.  This will allow you to analyze OEE data per traceability value - e.g., by part family or work order - instead of (or in addition to) analyzing that data by time period.

  • You may also enter "typical" DMS data in these records, if you wish - sample size, number of good units, number of nonconforming units, defects and counts.  The OEE charts will not analyze this information, but you can still use DMS charts to analyze this data.

Note: The examples for Available Time, Schedule Time, and Ideal Cycle Time provided in the topics OEE Availability, OEE Performance, and OEE Quality, are shown in minutes. You can use any time interval you want such as hours or seconds. However, to ensure accurate data, you must use the specific time increment you select consistently across the Available Time, Schedule Time, and Ideal Cycle Time values.

Get started drawing OEE charts

• See Drawing OEE charts