CAS Benefits


Benefits of the CAS Fatigue Risk Model


 The CAS Fatigue Risk Model is the longest operationally used biomathematical fatigue risk model with a 25+ year validated record of reducing errors, incidents, and injuries in a wide range of real-world operational settings (e.g., transportation, energy, manufacturing, etc.).

Here are some of the key benefits of utilizing the CAS Fatigue Risk Model in your operation:

1. Create a Fatigue Risk Informed Operation: Fatigue is one of the most common sources of human impairment, costing business billions of dollars each year. Yet most operations don’t have an easy way to measure employee fatigue.

To paraphrase the famous management consultant Peter Drucker: If you can’t measure fatigue risk in your operation, you can’t improve it.

The CAS Fatigue Risk Model empowers businesses to measure and track employee fatigue risk and it provides a critical feedback tool to make informed decisions to drive down the risk and cost of fatigue in their operations. CAS allows managers to:

a. Benchmark Fatigue – Document fatigue scores and trends (e.g., last week, last month, last quarter)
b. Assess Real-Time Fatigue - Determine who is at greatest risk for a fatigue-related incident right now and employ countermeasures
c. Fatigue Risk Informed Planning – How will this bid schedule, overtime assignment, shift swap, or schedule deviation impact an employee’s fatigue score? What schedule adjustments can we utilize to improve safety?

2. 3-Year Case Study: Measuring Fatigue Risk Improves Safety, Productivity, and Turnover: With the CAS Fatigue Risk Model, managers now have an objective tool to know the fatigue risk scores of their staff and proactively manage the risk (e.g., apply countermeasures, make schedule adjustments, etc.).

Over a 3-year period, a major trucking company with over 6,000 drivers utilized CAS to continually account for fatigue risk when making scheduling/dispatching decisions. By proactively reducing their driver's fatigue scores it led to: 

    • 32% reduction in accident rates
    • 81% reduction in average cost of accidents (i.e., less severe accidents)
    • 17% reduction in employee turnover
    • 24% increase in productivity

Achieve new safety and performance levels in your operation by utilizing the CAS Fatigue Risk Model to create a continuous improvement feedback loop:  

Fig 3
Figure 1: The Circadian Alertness Simulator (CAS) supports a risk-informed, performance-based safety culture. By providing a “fatigue risk score” for each work schedule it enables schedules/managers to assess the risk and take actions to reduce the risk, if needed. ©Circadian Technologies, Inc.

3. Weekly Fatigue Risk Alert: Imagine starting off every week knowing where your risk lies? With CAS, managers can run a report at the beginning of each week to determine who are their most fatigued employees. They can then proactively manage the risk by monitoring and implementing countermeasures.

4. Assess Fatigue Risk of Core Schedules and Bid Schedules: CAS provides an objective tool to assess the risk of your current “paper” schedules. Plus, it enables you to model how changes (minor or major) to the work schedule can impact fatigue risk.

5. Informed Overtime Distribution: Before assigning overtime, managers can utilize CAS to determine the current fatigue risk of overtime candidates and they can model how an overtime assignment would impact their fatigue score. Are some employees in a much better position to handle the overtime than others? You can now make informed decisions about overtime assignments and drive down employee fatigue risk.

6. Assess Shift Swapping Risk: Shift swapping is common at many organizations and is often managed with prescriptive rules that don’t fully account for individual employee fatigue risk. Empower your managers and schedulers to know the true fatigue risk of a shift swap when reviewing requests.

7. Create a Monthly CAS Fatigue Risk Score Card: Senior management needs data to understand the health of the operation and make informed decisions. With CAS, you can provide a monthly fatigue score for every department in your operation. You can now know:

a. How are our monthly fatigue scores trending?
b. What department or facility has the most risk?
c. Who were my most fatigued employees last month?

8. Incorporate Fatigue Risk into Your Incident & Workers Comp Analysis: Provide a richer analysis of incident and workers comp costs by adding an objective fatigue risk score to each incident.

a. Get an objective CAS fatigue risk score for all your incidents, accidents and workers’ comp events
b. Analyze fatigue contribution to the severity and cost of incidents
c. Learn how fatigue is impacting your safety and workers compensation bottom line

9. Evaluate Staffing Levels and Fatigue Risk: Many operations use the CAS Fatigue Risk Model as part of their staffing and workload analysis. For example:
a. Utilize CAS to model staffing scenarios and identify the optimal staffing levels for your operation. The one that best balances fatigue risk, workload and efficiency.
b. Monthly CAS scores can also reveal staffing trends. For example, have your average fatigue scores been climbing month-over-month? That’s a common sign that your staffing levels are no longer best meeting your workload and demand.