Lecture 8 - MFA

Question 1

The purpose of the _____ is the identify tasks that lead to the most fatigue accumulation, as fatigued muscles increase the potential for injuries.

Answer 1

MFA

Question 2

What was the MFA originally designed for?

Answer 2

To assess automobile assembly lines and fabrication tasks

Question 3

The MFA is best designed to assess production tasks having < ___ - ___ repetitions per minute.

Answer 3

12-15

Question 4

What are 2 limitations of the MFA?

Answer 4

1. Will underestimate the fatigue accumulation in sustained postural tasks (>30 repetitions/minute) as there is not enough time for full relaxation of the muscles between efforts.
2. The MFA will also underestimate fatigue accumulation in tasks where postural loads are sustained for longer than 30s.

Question 5

When is the MFA most effective?

Answer 5

When it is used to assess ALL muscle groups for each task.

Question 6

Muscle groups more vulnerable to fatigue accumulation involve what 3 things as opposed to short bursts of heavy loading?

Answer 6

1. Light loading
2. Long holding times
3. High repetitions

Question 7

When determining what type of job would benefit from undergoing MFA consider what three things?

Answer 7

1. Jobs with high incidence of injuries or complaints.
2. Difficulty finding people who can do the job or are willing to do the job.
3. Bad reputation among workers/supervisors.

Question 8

Prior to analyzing the task in question we first need to acquire a minimum of ___ minutes of unedited video footage, which is then used to asses the ______, _____ and ______ of each task.

Answer 8

5; intensity, duration, frequency