DI-HFAC-81399B

Critical Task Analysis Report

The Critical Task Analysis Report describes the results of analyses of critical tasks performed by the end user and provides a basis for identifying high risk tasks affecting human-system performance, mission accomplishment, system suitability, and safety.

Approval DateFebruary 6, 2013

AMSC Number8337

Preparing Activity—

Project Number—

OPRMI/AV PA

DTIC Applicable—

GIDEP Applicable—

Limitation—

Applicable Forms—

Approval Limitation—

Form Version—

DID Formatdd_form_1664

963C CompliantNo

DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.

Supersedes

DI-HFAC-81399A

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Description & Purpose

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Application & Interrelationship

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Use & Relationship

A critical task is one requiring human performance which, if not accomplished in accordance with system requirements, will likely have adverse effects on cost, system reliability, efficiency, effectiveness, or safety. The Critical Task Analysis Report (CTAR) describes the results of analyses of critical tasks performed by the end user and provides a basis for identifying high risk tasks affecting human-system performance, mission accomplishment, system suitability, and safety. The analyses and results described support verification that human engineering technical risks have been identified, minimized, or mitigated and that human-system performance has been adequately addressed from early design development through test and evaluation of the system, equipment, or facility.

a. This data item description (DID) contains the format and content preparation instructions for the data product generated by the specific and discrete task requirement as delineated in the contract.

b. Terms are defined in accordance with MIL-HDBK-1908.

c. This DID supersedes DI-HFAC-81399A.

Preparation Instructions

1Format.The CTAR format shall be contractor selected. Unless effective presentation would be degraded, the initially used format arrangement shall be used for all subsequent submissions.

2Tailoring.The CTAR shall be tailored to reflect the SOW, system specification, and the scope of the user interface development. The proposed tailoring of the CTAR content shall identify the paragraph, the proposed changes, and a rationale. Tailoring specified by the procuring agency shall also be included. If no tailoring is proposed beyond that specified by the procuring agency, this shall be stated.

3Content.The CTAR shall document whether system performance and maintenance requirements can be met by the combination of anticipated equipment, software, associated user interfaces, and personnel, and in ensuring that human performance requirements do not exceed human capabilities. The critical tasks defined shall be documented with regard to task duration versus time availability, task sequencing, and task simultaneity. Task requirements shall be documented, as applicable, for criticality, accuracy, precision, completeness, and the effects of task feedback and error tolerance/error recovery on performance. The report shall document the effects of sustained and continuous operations on human performance.

3.1The CTAR shall identify the criteria and methodsused to classify the task as "critical", the task analysis methodology followed to gather the information below (e.g., in accordance with MILSTD 46855), and identify personnel associated with the critical task interacting with the system, to include users (e.g. operational personnel, trainees, instructors, maintainers, and support personnel) as relevant to the system.

3.2For all human related tasks deemed critical, the report shall identify the following:

3.2.1System/Subsystem name

3.2.2Support equipment or ancillary devices to which the system interfaces

3.2.3Mission(s) and phase(s) including degraded modes of operation

3.2.4Scenario

3.2.5Function

3.2.6Task performance standards (e.g., including time, accuracy, precision, completeness)

3.2.7Task

3.2.8Subtask

3.2.9Time requirements for tasks with regard to task duration versus time availability

3.2.10Task sequencing

3.2.11Task simultaneity

3.2.12Task criticality

3.2.13The effects of task feedback and error tolerance/error recovery on performance

3.2.14The effects of sustained and continuous task performance on human performance

3.2.15Task assignment (e.g., who will perform the task and what cognitive or physical characteristics are required)

3.3For each critical task, the report shall include the following details to a level sufficient to identify potential problem areas:

3.3.1Preconditions that must be met before the task can be attempted, if any

3.3.2Information required and presented via the system, equipment, and software or associated user interfaces to the user(s), including support equipment and ancillary devices, that is relevant for performing the critical task/subtask, including cues for task initiationthe method of gathering information required to accomplish the task or subtask; and the type of information that is gathered.

3.3.3Information available to the user(s)

3.3.4Information required but not presented via the system or available from other sources

3.3.5Information processing, including cognitive demands (workload), and decision evaluation process

3.3.6Sense modalities (e.g., visual, auditory) required to successfully complete the task(s)

3.3.7Possible decisions that could be reached

3.3.8All possible actions that might be taken depending on the decision reachedresponding to specific information and combinations of information; and self-initiated responses and behaviors.

3.3.9The performance consequences of each critical task with respect to the effects upon both the immediate subsystem functions and the overall system mission

3.3.10Body movements (e.g., eye, head, hand, foot) or a definition of actions which each user might complete to accomplish the critical task/subtask

3.3.11Modality through which information is conveyed, and modality of user action

3.3.12Workspace envelope required by all actions that might be taken

3.3.13Workspace available

3.3.14Location of user within the workspace with relationship to the task interfaces

3.3.15Location and condition, including environmental, of the work environment

3.3.16Frequency and tolerances of all actions that might be taken

3.3.17Time available for completion of the task

3.3.18Feedback informing user(s) of the adequacy of actions taken or the failure to take an action

3.3.19Tools and equipment required, and their timely availability

3.3.20Number of personnel required, their skills, aptitude requirements, recommended ranks, rates, and ratings

3.3.21Probability, consequences, and severity of human error (e.g., downtime incurred)

3.3.22Potential for error recovery (e.g., resources required to recover and time until return to fully mission capable)

3.3.23Job aids, training, or references required, and their timely availability

3.3.24Communications required, including type of communication

3.3.25Hazards involved

3.3.26Personnel interaction where more than one person is involved

3.3.27Performance limits of personnel

3.3.28Operational limits of hardware and software and associated user interfaces

3.3.29Concurrent tasks and the associated potential workload and attention management

3.3.30Impact of operating and maintaining equipment while wearing personnel protective equipment (e.g., chemical biological radiological gear, exposure suits)

3.4Evaluation of proposed corrective actions for identified problem areas.

References

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