I'd include three categories of "things" in a safety booklet:

1. Expected actions required of operators, their supervisors, and senior management;

2. The resources needed for safe AND productive operating (for example, forklifts in "good repair", written job-performance standards, reasonably fast access to a repair service, verified operator skills. etc.) ;

3. Performance feedback that frequently informs operators, their supervisors, and senior management of how well, or poorly, they are meeting expectations.

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Best wishes.