The Measurement forms tab under ADMINISTRATION>Service Capability> selected Service Capability


 allows administrators to advise service technicians on which measurements they can make given a specific instrument category and service capability.


Clicking the "Add" button at the bottom of the page brings up a window allowing admins to adjust measurement parameters via the popup below.

Note: 

the Measurement Name should match the Parameter name in the specification test point: 


Editing Measurement Parameters

In the Measurements tab, you will be able to select the options for adjusting the number of measurement points and add additional measurement points per service level.  You can also select the measurement's quantity and unit, give the measurement a standard number of Measurement Points, add a Technique (set up in the Registration section of Basic Information in Administration; used for uncertainty budgets), and give the measurement points names that should default. The names will override the test point names set up in the specification used.



In the Readings/Tools tab, you'll be able to select the ability to edit the number of readings, channels, and displayed or expected value per service level.  You can also give the measurement a standard number of readings, set number of channels, reading logic, and how many tools can be used.


In the Display/Acceptance tab, you will be able to set what measurement readings will be displayed in your service order as well as set any Pass/Fail Criteria and Uncertainties/Guard banding.


In the Environment tab, you will be able to set which environmental conditions need to be recorded during service.


According to the new ISO 17025 requirements, a calibration certificate must display the date when the asset was received by the service provider for calibration. In addition, we need to be able to set the acclimation time required before calibration takes place and warn the technicians when they commence work too soon.


Click Environment 

Select Capture Acclimation Time field

Define the Acclimation Time Necessary

Click OK



Click "OK" after completing the previous steps, and the Custom Fields tab will become active.  

In the Custom Fields tab, you will be able to enter text that will become part of the form description, select for this information to be displayed in the Pass/Fail Selector, and add a new field by clicking "Add new field" where you will be able to create custom areas on your service level for additional information that may need to be recorded, i.e. unit conversions or extra client or vendor tools used. Also, you can link attributes. 

Once a custom field is linked to an attribute, the value of the attribute will be shown as the default value when the custom field is shown in a work order. When the work order is completed, the linked asset attribute will be updated with the value that was supplied during the work order. 


This functionality will allow asset owners to better expose their asset attributes to their vendors and have vendor data from a work order  update the assets attributes. 




Lets dive dip to Display/Acceptance tab and look for some ability you may use:


1. Allow measurements without PASS/FAIL criteria


Description: We understand that some data test points don't warrant a PASS/FAIL outcome. When no criteria is set, a special status 'DONE' is assumed upon completion of that data entry.  


Click the desired Measurement

Click Display/Acceptance

Ensure that no checkboxes are selected under Pass/Fail Criteria section




2. Calculate Range & Delta values and check them against the specification


Description: After entering the readings, the Range and Data fields will be calculated. 


RANGE - Difference between low & high readings

DELTA - Difference between mean & furthest reading



Within the Precision/Variation section, ensure that 'Display Range' and/or 'Display Delta' are selected


Within a Work Order containing that Instrument Type and Service level, the Range and Delta fields will appear



3. Ability to assign an uncertainty/guard band on your Measurement Parameters within your service levels.




To access the "Uncertainty band:" drop down, select the "Force guard bands (fail within uncertainty band)" check box.


Here you will see four formulas to assign to the "Uncertainty band" which all depend on the calculated Tool Uncertainty Ratio (TUR) value.


1. PFA (Probability of False Acceptance) < 2% (NCSL Z540.3) - uses the following formula for determining the widths of the guard band where: 

  • A is the acceptance limit
  • T is the specification limit
  • U is the measurement uncertainty (at the 95% confidence interval)
  • M is the multiplier to calculate the guard band, determined empirically
  • TUR is explained below in the TUR 4:1 section

A = T - U X M = T - U x 1.04 - e^(0.38log(TUR)-0.54)


2. Uncertainty (1 - 1 / TUR) where TUR is explained in the next step


3. TUR 4:1 (1.25 - 1 / TUR) - the goal is to have the standard being used on the unit under test (UUT) be 4x as more accurate than the UUT. If the TUR is 10:1, it will result in a pass since the standard is 10x more accurate. If the TUR is 0.5:1, it will result in a fail because the standard is not accurate enough.

TUR = (upper spec limit - lower spec limit) / 2 * expanded uncertainty

To set up the TUR in qualer, it may look like this:

The ambiguous pass/fail is optional. When applied, the TUR in the data form may look like this:

The TUR of 20:1 was achieved because (10.01 - 9.99) / 2 * 0.0005 = 20.


Please note: The guard bands are only applied when TUR is less than 4:1.  


4. RDS (SQRT(1 - 1 / TUR^2)) where TUR was explained above


To set up TAR (Test Accuracy Ratio), visit this article: TAR Test Accuracy Ratio.