Characterizing the intensity of changes made to reduce mechanical exposure

Area of Science:

• Occupational health
• Ergonomics
• Public health

Background:

• Workplace interventions aim to reduce mechanical exposures and prevent musculoskeletal disorders (MSDs).
• Existing literature shows varied effectiveness of these interventions.
• A key factor influencing intervention success may be "change intensity."

Purpose of the Study:

• To introduce and define the construct of "change intensity" for workplace interventions.
• To characterize the intensity of interventions within a participatory ergonomics program.
• To explore factors influencing change intensity and potential barriers.

Main Methods:

• Defined "change intensity" by parameters: affected body part(s), exposure reduction magnitude, job time fraction, workforce coverage, and adherence.
• Characterized intensity scores for peak and cumulative mechanical exposures for completed changes.
• Compared intervention intensities from a research program with those from published literature.

Main Results:

• Interventions involving production system redesign and reconfiguration were rated as medium to high intensity.
• Most other interventions were categorized as small intensity.
• Identified factors that maximize intensity and potential barriers to achieving higher intensities.

Conclusions:

• Change intensity is a crucial factor influencing the effectiveness of workplace interventions for MSDs.
• Higher intensity interventions, such as system redesigns, show greater potential for MSD prevention.
• Understanding and maximizing change intensity is key to improving intervention outcomes.