BIOMEC Services, LLC

Exemplar Analyses

Job Task Analysis

There may forms of Job Task Analyses.  An ergonomic Job Task Analysis (JTA) should include a detailed ergonomics profile of the workflow, the work tasks, and the steps of each task.  If the focus is the amount of work exposure over the course of an entire shift, the JTA should include the information above as well as the non-work activities that make up a typical shift in a given work setting.  

An ergonomics-based JTA should provide both an outline of the work flow in a shift and numberic data for each task that regularly occurs over the course of a typical shift.  The outline should describe the sequence of events that covers an average workday.  The numeric data for each task should be described in terms of the duration of each task, the forces required for each task, distances of the physical movement or handling of items related to each task and the repetitions or number of movements for each task.  The physical demands should include both the whole-body and the upper extremities for each task that is included in the JTA.

Whole-body Vibration Analysis

Vibration data collection should be done in a "real setting" to most-accurately represent the ergonomic vibration exposures to the Operator of a machine, vehicle or other setting as per the ISO 2631-1 standard.  The WBV data collection should be done in the field and as the machine or item is in normal operation so to include all relevant vibration events such as traveling in the machine or vehicle, sitting in the machine or vehicle as it idles and/or is in "wait " mode and when the machine or device is in the "production mode" or the performance / purposeful phase of activitiy. 

All of these elements listed above should be part of WBV testing as well as determinations of the duration of each of those separate vibratory events.  An ergonomics vibration analysis that does not include these elements is overlooking or missing vibration exposure whether it is intended or not.   

    Task Component Analysis 

    Task Component Analyses focus only on a single task. A single job task may have only one step which may take only a few seconds (turn a valve) whereas some tasks have multiple steps and can take upwards of 30 minutes. Much like a JTA, the TCA includes the sequence of the steps of the task and each step of the task includes the amount of force, repetition, duration, movement/handling distance and other necessary information to fully describe the task. 

    Part of the use of TCAs and the building of an ongoing TCA list is that the list will finally include all tasks that typically occur in a given work setting.  A relevant and specific list of TCAs can be combined so that a JTA (the tasks that occur over an entire shift) can be put together.  
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