Normalized contextual performance metric for the assessment of fatigue-related incidents

A computer program product embodied in a non-transitory medium and comprising computer-readable instructions which, when executed by a suitable computer, cause the computer to perform a method for calculating determining a normalized contextual performance metric for quantifying with historical fatigue-incident data the operational risk to an enterprise caused by one or more individuals within the workforce of the enterprise attaining specified fatigue levels, using a computer, the method comprising:

• [1] for each of one or more individuals:
• [1.1] providing, at the computer, an individual's activity occurrence timeline comprising one or more activity periods, each activity period comprising a start time corresponding to the start time of an activity occurrence, and an end time corresponding to the end time of the activity occurrence, and a period activity value that is a magnitude of at least one measurable characteristic of the activity occurrence, wherein, for at least one activity period, the measurable characteristic of the activity occurrence is one or more of:
• time worked, distance traveled, rate of production, production efficiency, production quantity, production quality, tasks performed, inventory consumed, and freight moved, the activity occurrence corresponding to a particular work activity occurring contiguously within a workshift of the individual;
• [1.2] providing, at the computer, the individual's fatigue timeline comprising at least in part one or more fatigue periods, each fatigue period comprising a start time, an end time, and a period fatigue level corresponding to a neurobehavioral state of the individual during the fatigue period;
• [1.3] determining, by the computer, all temporal intersections of the activity periods and the fatigue periods, such that each temporal intersection comprises a start time, an end time, and is associated with an activity period and a fatigue period;
• [1.4] for each of the temporal intersections, creating an activity record, by the computer, the activity record parameterized by:
• an activity fatigue level and an activity value;
• wherein the activity fatigue level is the period fatigue level of the fatigue period associated with the temporal intersection, and wherein the activity value is the period activity value of the activity period associated with the temporal intersection multiplied by a ratio of a duration of the temporal intersection to a duration of the activity period;
• [2] providing, by a computer, one or more incident records, wherein each incident record represents an incident occurrence and is parameterized by:
• an incident value that is a measurable characteristic of the incident occurrence, wherein for each incident record, the incident value is a one of:
• an economic cost, a legal or administrative compliance status rating, a customer satisfaction rating, an economic performance rating, a lost productivity cost, ad administrative burden, a number of injuries caused, a number of injuries caused by a specific severity, an incident severity level, a count of events related to the incident, a quality rating of products or services, and an employee productivity rating;
• and an incident fatigue level that is a neurobehavioral state, corresponding to the time of the incident occurrence, of one or more individuals associated with the incident occurrence;
• [3] selecting, by the computer, one or more activity records from among the created activity records, wherein the selected activity records are parameterized by activity fatigue levels within a fatigue level range of interest;
• [4] selecting, by the computer, one or more incident records from among the provided incident records, wherein the selected incident records are parameterized by incident fatigue levels within the fatigue level range of interest;
• and
• [5] determining, by the computer, a normalized contextual performance metric for the fatigue level range of interest, the normalized contextual performance metric comprising a sum of the incident values of the selected incident records divided by a sum of the activity values of the selected activity records.