# Shift Work Fatigue Risk Assessment for Manufacturing Plants > Source: https://netray.co/tools/shift-work-fatigue-risk-assessment > Publisher: Netray (netray.co), AI and integration engineering for ERP and manufacturing systems. > Section: Free Tools ## Short answer Score your shift pattern against common fatigue risk factors and get prioritized actions to reduce them. ## Category ehs-workforce ## Industry Manufacturing ## Audience - Plant HR - EHS manager - Production supervisor - Plant manager ## Tool **Kind:** assessment **Questions:** #### What is the typical shift length? **Options:** ##### 8 hours or less **Score:** 10 ##### 10 hours **Score:** 7 ##### 12 hours **Score:** 4 ##### More than 12 hours at times **Score:** 0 #### How much rest is there between consecutive shifts? **Options:** ##### At least 12 hours always **Score:** 10 ##### 11 hours, with occasional exceptions **Score:** 7 ##### Sometimes less than 11 hours (quick returns) **Score:** 3 ##### Frequently less than 10 hours **Score:** 0 #### How many consecutive night shifts are worked? **Options:** ##### No night work **Score:** 10 ##### 2 to 3 nights **Score:** 8 ##### 4 nights **Score:** 4 ##### 5 or more nights **Score:** 1 #### How does the rotation move? **Options:** ##### Forward (days to afternoons to nights) **Score:** 10 ##### Fixed shifts with no rotation **Score:** 8 ##### Mixed, partly backward **Score:** 4 ##### Backward or unpredictable **Score:** 0 #### How much overtime is typical per person per week? **Options:** ##### None or under 2 hours **Score:** 10 ##### 2 to 6 hours **Score:** 7 ##### 6 to 12 hours **Score:** 3 ##### More than 12 hours regularly **Score:** 0 #### How many consecutive days can be worked without a day off? **Options:** ##### 5 or fewer **Score:** 10 ##### 6 **Score:** 6 ##### 7 to 9 **Score:** 3 ##### 10 or more **Score:** 0 #### How are breaks organized? **Options:** ##### Fixed, enforced breaks with a rest area **Score:** 10 ##### Fixed breaks, not always taken **Score:** 6 ##### Breaks left to the operator **Score:** 3 ##### No reliable breaks **Score:** 0 #### How much advance notice is given for schedule changes? **Options:** ##### Two weeks or more **Score:** 10 ##### One week **Score:** 7 ##### A few days **Score:** 3 ##### Same day changes are common **Score:** 0 #### How are fatigue incidents or near misses tracked on night and long shifts? **Options:** ##### Tracked, reviewed and acted on **Score:** 10 ##### Recorded but rarely reviewed **Score:** 5 ##### Only informal feedback **Score:** 2 ##### Not tracked **Score:** 0 #### Is there a policy for workers who report being too tired to work safely? **Options:** ##### Written policy with no penalty and a replacement plan **Score:** 10 ##### Informal practice that supervisors honor **Score:** 6 ##### Case by case **Score:** 2 ##### No policy **Score:** 0 **Bands:** #### High fatigue risk **Min:** 0 **Max:** 39 **Verdict:** Your pattern combines several recognized fatigue risk factors, and safety critical tasks are exposed. **Recommendations:** - Stop scheduling quick returns of less than 11 hours between shifts - Cap consecutive working days and weekly overtime hours - Move safety critical tasks away from the last hours of night shifts - Set up a no-penalty process to report fatigue #### Moderate fatigue risk **Min:** 40 **Max:** 64 **Verdict:** There are controls in place, but some patterns or practices still raise risk, especially around nights and overtime. **Recommendations:** - Review night shift length and consecutive nights - Move to forward rotation where you have backward changes - Track overtime per person, not just per department - Add fatigue to incident investigations #### Managed **Min:** 65 **Max:** 84 **Verdict:** Your shift design follows most good practice. Focus on consistency and exceptions. **Recommendations:** - Audit exceptions to rest and overtime rules monthly - Provide fatigue and sleep guidance in training - Review schedule change notice periods #### Well controlled **Min:** 85 **Max:** 100 **Verdict:** Your scheduling and reporting practices are strong. Keep checking data to make sure practice matches policy. **Recommendations:** - Compare actual hours worked with planned schedules - Re-run this assessment when the shift pattern changes - Share your practice across sites ## Content **Intro:** Fatigue raises error and injury risk, particularly on night shifts, long shifts and during periods of heavy overtime. This assessment scores ten common fatigue risk factors in your pattern and tells you where to act first. **Sections:** #### How to use the assessment **Body:** Answer for the shift pattern that most of your workers follow, or run it once per department if patterns differ. Use real rostered and worked data, not the policy on paper. The score is a percentage of the maximum, and the band gives prioritized actions. Export the result to share with your EHS committee or to include in a risk register. #### The factors behind the score **Body:** The questions cover shift length, rest between shifts, consecutive nights and working days, rotation direction, overtime, breaks, schedule predictability, and your reporting culture. These are widely recognized fatigue risk factors in guidance from occupational safety bodies. Forward rotation is generally easier to adapt to than backward rotation, and quick returns reduce sleep time. **Bullets:** - Risk rises with long shifts, especially beyond 10 hours - Night work increases error rates in the early morning hours - Frequent overtime shortens recovery - Unpredictable schedules affect sleep planning #### Turning the score into actions **Body:** Start with the lowest scoring answers. Quick returns, long runs of nights and unlimited overtime are the easiest to control through scheduling rules and approval workflows. Then address culture: a worker who fears discipline will not report tiredness. Reassess after any change in shift pattern, headcount or demand. #### Limits of this assessment **Body:** It is a screening tool, not a validated clinical or regulatory instrument. Individual factors such as commute, sleep disorders and second jobs matter. Some countries have legal limits on rest and working time that this tool does not replace, and safety critical operations may need a formal fatigue risk management system. **Cta:** If your ERP or time system holds the rosters and hours worked, we can help build a report that flags quick returns and excess overtime automatically. **Faq:** #### How many hours of rest between shifts is safe? **Answer:** Many guidelines and several labor laws, such as the EU Working Time Directive, use 11 consecutive hours of rest per 24 hours as a baseline. Shorter gaps, often called quick returns, reduce sleep and should be rare, planned and compensated where possible. #### Are 12 hour shifts unsafe? **Answer:** Not automatically, but risk rises with length, especially on nights, with heavy physical or monotonous work, and when combined with overtime. Many plants run 12 hour patterns with adequate rest days, rotation and controls, and monitor them closely. #### What is forward rotation? **Answer:** Forward rotation moves from earlier to later shifts, such as days then afternoons then nights. It matches the body clock's natural tendency to drift later, so most workers adapt more easily than with backward rotation. #### Does this replace a fatigue risk management system? **Answer:** No. It is a quick screening exercise. Safety critical industries may need a formal system with hazard analysis, data, training and review. Use the result as an input to your wider EHS process. ## Search terms shift work fatigue assessment, fatigue risk management manufacturing, night shift fatigue checklist, shift pattern risk assessment, 12 hour shift fatigue, rotating shift rest period, overtime fatigue safety, fatigue risk assessment template --- Talk to an engineer: https://netray.co/contact?intent=erp_ai | Machine catalog: https://netray.co/agent/catalog.json