A job hazard analysis (JHA), also well known as Job Safety Analysis (JSA), is a technique that focuses on job tasks in order to identify hazards before they occur and to eliminate or mitigate them prior to conduct the related work.
During a job, various processes are interconnected, especially processes that are related to human factor (e.g. workers), tasks, tools and other environment factors (e.g. weather conditions). In order to minimize job complexity and related hazards is necessary to implement various engineering controls, administrative controls, as well as the proper usage of Personal Protective Equipment (PPE).
To ensure an effective job hazard analysis, the following tips should be considered in order to reinforce organization safety culture and to prevent incidents, injuries and other deviations from safety management system:
-Management commitment for a free incident workplace and proper safety management system implementation
-Proactive safety culture should be digested by workers, suppliers and/or other 3rd parties
-Review your company’s accident/injury/illness/near-misses/non-compliance history to determine which jobs pose the highest risk to employees or/and other company’s assets (e.g. human error that could lead to serious injury)
-Consult best practices related to job performance (e.g. industry feedback, industry guidelines and statistics)
-Verify prior job initiation that workers/employees are trained and familiarized for specific tasks and their certificates are valid (e.g. for equipment/machine handling)
-Refresh training to workers and to supervisors in order to be informed for new job difficulties, identified hazards and recommended controls
-Involve job experts, supervisors, workers to job hazard analysis and to toolbox meeting due to their unique understanding of the job
-Prioritize jobs based on previous incidents, injuries, illness and identify tasks with high risk 
-Work permits to be granted and to be approved prior job initiation (e.g. hot work permit)
-Inform supervisor or/and management team when dangerous condition are in place
-Any uncontrolled hazard to be managed prior job initiation
-Jobs with complexity, new jobs/tasks, jobs with changes in process and/or jobs with unacceptable risks should be evaluated prior job initiation through risk management and management of change process
-New workers/employees to be familiarized and to be trained prior job initiation as per safety management system requirements
-Evaluate controls efficacy (e.g. hazard occurs very quickly) & controls effectiveness
-Ensure that particular tasks of the job are not affected by other operation, activity or/and other job
-Monitoring weather changes or/and other environment conditions
-Monitoring any environmental hazards results from the performance of the job (e.g. dust, heat, chemicals)
-Reassure that equipment/systems are closed or are secured during break-time
-Shift work can increase the likelihood of incidents and injuries at work
-Rest hours to be checked and to be recorded properly in order to avoid or minimize fatigue
-Reassure job continuity (e.g. lack of spares and supplies)
-Review the Job Hazard Analysis periodically and update JHA library when a new control or/and a hazard will be added
-As part of continuous improvement process, updated JHA to be used for training, familiarization, incident investigation, etc.
Source: systemantis.com
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