The OEE report is all about seeing the efficiency of your production process. You can analyze OEE based on the selections you make in the filters and for the x-axis. Each of the options gives you a unique way of seeing your production process so that you can spot trends and understand how each of the OEE components (performance, availability, quality) affects your overall efficiency.

OEE (Overall Equipment Effectiveness) is a lean manufacturing tool and universal best practice to monitor, evaluate and improve the effectiveness of a production process. This could be an assembly line, machine cell, packaging line, filling machine, etc.

What does the OEE chart show?

The OEE chart visualizes how effectively you utilize your plant and production equipment. It allows you to see how the three components of OEE change in time and what effect each of them has on the overall OEE percentage. The chart also visualizes technical availability and it is possible to view it either as a bar chart or line chart.

What production data is displayed in the OEE data table?

No matter the category you choose to analyze, you will have information regarding availability, technical availability, performance, quality and OEE.

• Availability represents the percentage of planned time that a station (production line or workstation) is actually working or producing. Availability is part of the OEE equation.
  • Availability = Operating time / Planned time
  • In Shift View colors, Availability = (green + yellow) / (shift time - planned stops not included in OEE)
• Performance represents the actual running speed of the equipment against its specified running speed. Performance is part of the OEE equation. Performance over 100% can mean that measuring of production is not set up correctly or targets (ideal cycle times) are set too low.
  • Performance = produced quantity / ideal quantity
    • Ideal quantity = the quantity that would have been possible to be produced if there had not been any speed loss, unplanned downtime and planned downtime that is included in the OEE calculation.
  • In Shift View colors, Performance = green / (green + yellow)
• Quality indicates the amount of products meeting the quality requirements (good products) out of all products produced. Quality is part of the OEE equation.
  • Quality = good products / (good products + scrap)
  • In Shift View, scrap is visualized using orange product circles.
• Technical availability, as a percentage, represents planned time with the exclusion of unplanned technical stops. This means that it shows the percentage of planned time without unexpected technical difficulties or maintenance needs and helps you understand how well your maintenance is organized.
  • Technical availability = (planned time - unplanned technical stops) / planned time.
• OEE is an asset performance indicator that shows how effectively the equipment is utilized. OEE breaks the effectiveness of a manufacturing unit into three components: availability, performance and quality.
  • OEE = quality x availability x performance.

The Total of OEE is calculated as weighted average, taking into account the planned production time.

• Planned production time = Shift time - Planned stops not included in OEE

Examples of weighted average

1. Total OEE of a month

   Availability of the month = (sum of operating time of all shifts in that month) / (sum of planned time of all shifts in that month)

   operating time = time when the machine was operating (green or yellow)

   planned time = shift time - planned stops

   Performance of the month = (sum of good production time of all shifts in that month) / (sum of all good and speed loss times of all shifts of the month)

   good production time = green time in Shift view

   speed loss time = yellow time in Shift view

   Quality of the month = (sum of good quantity of all shifts in that month) / (sum of total quantity of all shifts in that month)

   OEE of the month is the multiplication of the 3

2. Total OEE of different stations

   Station1 is planned to work 5 days a week 8 hours per day, and Station2 is planned to work 7 days a week 24 hours per day. If the OEE of Station1 is 95% and the OEE of Station2 is 15% then the average is 55%, but the weighted average OEE is 30,4%. Based on this, if we display the OEE as 55%, it is 82% higher than the real value.

   Due to this, the OEE leans towards the stations that are planned to work more and it is also correct because more resources are spent there (labor, energy, machine amortization, etc.).