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Specific product support information for OASYS Job Match software.

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SkillTRAN provides a comprehensive set of documentation on all facets of its products.  Click items on the list below to view.

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1991 Dictionary of Occupational Titles (DOT)

The following topics are often encountered by our customer base.  It is challenging to apply the DOT as it was built to these "gray areas".  Over the years, SkillTRAN has developed these suggested ways of interpreting existing information that may be helpful.  Nothing will replace your good judgment and careful review of occupations suggested in any computerized search results.

The suggestions below for adjusting worker characteristics are prepared by SkillTRAN's resident vocational expert, Jeffrey A. Truthan, a Certified Vocational Evaluator (CVE). His 40+ years of experience in diverse settings in the rehabilitation industry along with experience handling thousands of analyses every year contribute to these suggestions.

The ultimate responsibility for adjustment of worker characteristics remains exclusively with you. You should have good evidence to support your choice of any restrictions you use. Be prepared to defend your choices.

The characteristics reported about occupations have greatly improved the ability of the vocational professional to isolate suitable occupations. Other health care professionals (especially physicians) need to understand the definitions of these characteristics. Work with them to arrive at a mutual understanding of the definitions used. Learn all you can about the client, the worker characteristics as defined in the Revised Handbook for Analyzing Jobs and the frequency distribution of these characteristics (DOT Pocket Guide). Carefully consider the occupational alternatives identified in the computer search to validate the search results in the context of your knowledge of the local industry and its typical demands on workers in such occupations.

For long term planning, set worker characteristics to the levels expected when maximum medical improvement is achieved.

If training or retraining is anticipated, set GED and SVP characteristics to the anticipated post-training levels.

The 1991 Revised Handbook for Analyzing Jobs (RHAJ) defined all of the terms used in the Dictionary of Occupational Titles (DOT).  It includes a definition of all of the worker characteristics and their definitions.  As a courtesy to the rehabilitation, forensic, and counseling professions and particularly for SkillTRAN customers, SkillTRAN has excerpted significant portions of the RHAJ

 

    U.S. Department of Labor (1991).  Revised Handbook for Analyzing Jobs.  Washington, DC: Government Printing Office.

 

As transcription is completed, additional sections will be added. This is NOT the complete text of the RHAJ. The original publication is no longer available from the government.  However, reprints of this critical resource book are available at Elliott & Fitzpatrick

The RHAJ was the key guiding document used by job analysts to write job and occupational descriptions and to rate worker characteristic values while building the 1991 edition of the Dictionary of Occupational Titles. As such, any interpretation of what the characteristics mean should be strictly in the context of the RHAJ definitions. Chapters devoted to worker characteristics are primarily highlighted.  Extensive examples of each functional level are NOT yet included in these transcriptions.  Certain chapters helpful to the process of Job Analysis are posted.

Excerpted material available from the RHAJ:

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All of the DOT worker characteristics are fully described in the 1991 Revised Handbook for Analyzing Jobs. The RHAJ is the foundation upon which the DOT was built.  Job Analysts used the RHAJ definitions to guide their coding of each of the observed worker characteristics.  

Number values used in Aptitudes, General Educational Development, and for Specific Vocational Preparation (SVP) represent a category describing a level of the functioning needed to learn/perform the occupation. Rather than being a percentile (%ile) value (which is a concept coming from the world of testing of individual performance relative to the performance of others), the number values represent a category describing an approximate level of the aptitude/functioning needed to learn/perform the occupation. The number 5 was used to mean that no aptitude in that area was needed for that occupation.  The original 1972 Handbook for Analyzing Jobs explains this on page 294.  Also see page 9-2 in the 1991 RHAJ chapter 9 for more detail.

    • For Aptitudes [RHAJ Chapter 9], coding was done on a scale of 1-5 where 1 was high and 4 was low.  A rating of 5 meant that very little or no aptitude in this category was needed to learn/perform the occupation.
    • For General Educational Development (GED) - [RHAJ Chapter 7], the scale ranged from 1-6 with 6 being high and one being low.  A value of 1 meant the lowest level, not inability.
    • For Specific Vocational Preparation (SVP) - [RHAJ - Chapter 8], the scale ranged from 1-9 with 1 being low and 9 being very high.  
    • For Temperaments (RHAJ Chapter 10), a rating of "present" was assigned if the job analyst judged that the worker would need to be adaptable to specific kinds of required job situations. 
    • For Physical Demand and Environmental Conditions [RHAJ Chapter 12], ratings were based on a frequency scale of Not Present, Occasionally (up to 1/3 of the work day), Frequently (1/3-2/3 of the work day), and Constantly (> 2/3 of the work day).
    • The Strength factor [RHAJ Chapter 12] is derived from a complex combination of factors including weights, forces, and worker positions.  

In its definition of each of these factors, the RHAJ presents a significant array of examples of work-related activity that best exemplifies each observed level. Each rating reflects the learning/performance requirements of a specific occupation.  It does NOT represent how this factor is distributed among the general population (as in a traditional bell-shaped curve model of frequency distribution).  

It is often very helpful to understand that these values represent requirements put upon the worker to learn/perform the occupation successfully. Absent a sufficient amount of a particular aptitude or other function, a worker is less likely to succeed at the occupation.

Because the ratings of occupations looked at occupations rather than people, the ratings are often skewed in surprising directions.  There are actually few occasions in which a "normal" bell-shaped distribution occurs.  It is helpful to be very aware of the frequency with which each value is observed.  The tables below show frequency counts for each of the factors across the DOT.  These counts are also neatly summarized in the electronic Pocket Guide to the DOT, which is also available in handy printed form at SkillTRAN.