Help Manual

Contents






Sigma Magic Help Version 17

OEE Analysis

Overview

The overall Equipment Efficiency (OEE) worksheet can be used to determine the equipment's effectiveness metric. It calculates three ratios (Availability, Performance, and Quality) and multiplies them together to get an overall effectiveness number called OEE. OEE numbers vary from 0% to 100%, with a higher number indicating better equipment efficiency.

To add this template to your workbook, click on Lean and then select OEE Metric.

Inputs

Click on Analysis Setup to open the menu options for this template.

Setup

A sample screenshot of the setup menu is shown below.
inputs
1
Area Name: Specify the name of the work area for which the OEE is being determined. This field is optional and can be left blank.
2
Equipment Name: Specify the name of the equipment for which the OEE is being determined. Note that both the Area Name and Equipment Name cannot be blank.
3
Report Frequency: Specify the frequency of collection of data for the OEE. The available options are:
OptionDescription
DailyYou will need to enter daily numbers for the OEE on the worksheet.
WeeklyYou will need to report weekly numbers for the OEE on the worksheet.
MonthlyYou will need to report monthly numbers for the OEE on the worksheet.
4
Num Rows: Specify the number of rows to format the worksheet. Note that all data below these rows will be cleared.
5
Target OEE: Specify the target value of OEE. The default global benchmark for OEE is 85%. This information is used to compare the actual OEE to a target value.
6
Highlight OEE: Specify if you want to highlight any rows on the worksheet. The default global benchmark for OEE is 85%, so you could choose to highlight all rows with less than this value. If you do not want to highlight any rows, enter 0%.
7
Help Button: Click on this button to open the help file on this topic.
8
Cancel Button: Click on this button to exit without saving any changes.
9a
Create Button: Click on this button to save changes and update the information on the worksheet. This will take you to the worksheet, where you can update the information.
9b
OK Button: Click on this button to save changes and update your analysis results.
A sample screenshot of the worksheet is shown below. outputs Enter the following information on the worksheet:
NumDescription
1Enter the date we want to calculate the OEE metric. If you have several pieces of equipment, then you could rename this column for equipment and enter different equipment numbers. This will give you the historical performance of the given equipment.
2Enter the hours you plan to use this equipment. For example, if you are planning to have a one-shift operation, then the planned hours could be 8.
3Enter the number of hours the machine is not scheduled for production. For example, lunch breaks, tea breaks, etc. This could equal 1 hour. If the equipment works during Lunch and breaks, then enter 0 hours.
4Enter the hours the equipment is down due to equipment problems. This is the unplanned downtime of the equipment. If the equipment is down several times a day, add up all the hours to report the total downtime. For example, if the equipment is down in the morning for 1/2 an hour and in the afternoon for 1/2 an hour, then you would report 1 hour as downtime.
5Enter the ideal output of the equipment. This equals the production rate under ideal conditions times the number of hours the equipment runs. So, if the ideal production rate is 4/hour and the equipment produces for 7 hours, then the ideal output is 28.
6Enter the actual output of the equipment - as measured at the end of the shift/day. For example, if you counted 20 pieces produced at the end of the day, then report 20.
7Enter the first time right quantity. So, of the 20 that were produced, if 1 of them required rework and 2 of them were scrapped, then the first time, the right quantity = 17.

Charts

You will see the following dialog box if you click the Charts button. Charts
1
Title: The system will automatically pick a title for your chart. However, if you want to override that with your title, you can specify a title for your chart here. Note that this input is optional.
2
Sub Title: The system will automatically pick a subtitle for your chart. However, if you want to override that with your subtitle, specify a subtitle for your chart here. Note that this input is optional.
3
X Label: The system will automatically pick a label for the x-axis. However, if you would like to override that with your label for the x-axis, you can specify a different label here. Note that this input is optional.
4
Y Label: The system will automatically pick a label for the y-axis. However, if you would like to override that with your label for the y-axis, you can specify a different label here. Note that this input is optional.
5
X Axis: The system will automatically pick a scale for the x-axis. However, if you would like to override that with your values for the x-axis, you can specify them here. The format for this input is to specify the minimum, increment, and maximum values separated by a semi-colon. For example, if you specify 10;20, the minimum x-axis scale is set at 10, and the maximum x-axis scale is set at 20. If you specify 10;2;20, then, in addition to minimum and maximum values, the x-axis increment is set at 2. Note that this input is currently disabled, and you cannot change this setting.
6
Y Axis: The system will automatically pick a scale for the y-axis. However, if you would like to override that with your values for the y-axis, you can specify them here. The format for this input is to specify the minimum, increment, and maximum values separated by a semi-colon. For example, if you specify 10;20, the minimum y-axis scale is set at 10, and the maximum y-axis is set at 20. If you specify 10;2;20, then, in addition to minimum and maximum values, the y-axis increment is set at 2. Note that this input is currently disabled, and you cannot change this setting.
7
Horizontal Lines: You can specify the values here if you want to add a few extra horizontal reference lines on top of your chart. The format for this input is numeric values separated by semi-colon. For example, if you specify 12;15, two horizontal lines are plotted at Y = 12 and Y = 15, respectively. Note that this input is optional.
8
Vertical Lines: You can specify the values here if you want to add a few extra vertical reference lines on top of your chart. The format for this input is numeric values separated by semi-colon. For example, if you specify 2;5, two vertical lines are plotted at X = 2 and X = 5, respectively. Note that this input is optional.

Verify

If you click the Verify button, the software will perform some checks on the data you entered. A sample screenshot of the dialog box is shown in the figure below. Verify The software checks if you have correctly specified the input options and entered the required data on the worksheet. The results of the analysis checks are listed on the right. If the checks are passed, they are shown as green-colored checkmarks. If the verification checks fail, they are shown as a red-colored cross. If the verification checks result in a warning, they are shown in the orange exclamation mark, and finally, any checks that are required to be performed by the user are shown as blue info icons.
1
Item: The left-hand side shows the major tabs and the items checked within each section
2
Status: The right-hand side shows the status of the checks.
3
Overall Status: Shows the overall status of all the checks performed. If all the checked items are okay, the status image in the header will show a green checkmark. If any checks fail, then the status image in the header will show a red cross mark.

Outputs

Click on Compute Outputs to update the output calculations. If all template elements have been completed, the following message is displayed when you click the Compute Outputs button. Outputs 2 The analysis reports the availability, performance, quality, and OEE metrics for each day the information is entered into the worksheet. A graph of the variation of these metrics by day is also plotted as a time-series plot. This plot shows the trend of the OEE (if it is getting better or worse with time). Finally, the comments area shows the overall OEE metric for all data points. It also compares this metric with the benchmark metric of 85%.

Notes

Here are a few notes regarding this analysis:
  • Note that OEE numbers cannot exceed 100%. If you make a data entry mistake, the software will let you know that, and it will not calculate more than 100%.

Examples

The following examples are in the software's Examples folder.
  • For the data given in the file, calculate the OEE metric (OEE 1.xlsx)


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