Usability
Early-stage user testing
What is ... Formative Assessment?
This evaluation involves six multipliers and a load constant.
What is... NIOSH Lifting Equation OR NIOSH Lifting Guide
This upper extremity analysis has 6 multipliers that vary between 0.25 and 13.
What is ... The Strain Index
Though it sounds like a Star Trek villain, this subjective scale allows workers to report the level of intensity of their own jobs.
What is... the Borg Scale?
The usability experienced by first time users.
What is ... Guessability?
99% of Men and 75% of women can perform a lift safely when the Lifting Index is below this value.
What is ... 1.0
A "7" is the maximum, worst-case score on this evaluation tool.
The so-called "Secret" of ergonomics.
What is ... Adjustability?
This usability assessment involves two very similar designs that vary by only one feature competing directly with one another.
What is ... A/B Testing?
This lifting analysis was once part of a legally enforceable safety regulation.
What is.... the WISHA Lifting Tool
This analysis is similar to RULA but has a greater emphasis on the trunk and lower body.
What is ... REBA
This MSD risk factor is not one of the four primary risk factors, but it often becomes the dominant factor when it is found in a job.
What is ... Vibration?
This type of user-centered design incorporates actual users in the design process at all design stages.
What is ... Participatory Design?
This lifting analysis has no consideration at all for lifting frequency.
What is ... The Utah Back Compression Equation OR The Utah Analysis
In REBA, this is the maximum score.
What is ... 15
In 2010, it was discovered that this human factors-related cause of death might exceed 400,000 per year, making it the 3rd leading cause of death in the U.S.
What are ... Medical Errors?
This NASA TLX scale factor is a measure of the success the user had in accomplishing the task goals.
What is ... Performance?
Only these two lifting analyses can consider the effect of forward trunk flexion on a lifting task.
What are.... ACGIH Lifting TLV AND Utah Back Compression Equation
This is the only one of the Four Primary Risk Factors not considered by RULA.
What is ... Duration?
Fit the _______ to the _________.
What is ... Task/Job AND Worker/Person