MAP-01-011 HFI Technical Guide - Human Factors Integration ...

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Chapter 15 – Operability And User-Equipment Interaction15.3.2.3 Define User TasksPurposeInputsTo provide more detailed descriptions of the tasks to beperformed by users in each equipment option.Products from:• Critical user performance (Sect 15.3.2.2),• Outline tasks (Sect 15.3.1.2) and• Allocation of functions (Sect 15.3.2.1).Methods • Operational Scenario Description.• Task Analysis.• Task Synthesis.Steps • Identify the user roles for the equipment defined in theallocation of functions.• Identify user tasks in each option and decompose these intodetailed sub-tasks (Task Analysis & Task Synthesis).• Conduct analysis of the difficulty, frequency and importanceof tasks using Operational Scenarios.• Ensure that user characteristics required for taskperformance are reflected in the PSTAD (see Chap 6) andidentify any mismatch requiring further study of manningoptions or re-allocation of functions.• Identify human performance risks and limitations associatedwith tasks and re-allocate functions to optimise human taskdesign.• Develop detailed descriptions of task goals, inputs,processing, decision-making, outputs and problems for usein detailed design and other HFI processes.OutputsTask descriptions for each anticipated user role in eachequipment option.HFI ActivitiesNov 2006 Page 15-23 Issue 4
MAP-01-011 – HFI Technical Guide (STGP 11)15.3.2.4 Specify Logical User-Equipment InterfacePurposeInputsTo describe the logical flow of information between users andequipment to be supported at the user-equipment interface.Products from:• Allocation of Functions (Sect 15.3.2.1) and• Define User Tasks (Sect 15.3.2.3).Methods • User-Equipment Interface Design.• Operational Scenario Description.StepsThis HFI activity draws on the high-level descriptions ofinformation flow between human and equipment generated inthe allocation of functions. This activity generates more detaileddefinitions of the data and controls required in the userequipmentinterface for each equipment option. The descriptiondoes not, at this stage, describe the physical format of displaysand controls nor the form of the dialogue. Use is made,however, of the task descriptions to indicate additional data andcontrols to support human performance and reduce errors.• Identify each information flow and group these into dialoguesusing task descriptions to determine each discrete dialogue(goal, task input and task output).• Describe the data presented to the user in detail includingalerts, alarms, warning and error conditions within eachdialogue.• Describe the data input by the user and identify requiredcontrol inputs e.g. ‘commit’, ‘save’, ‘undo’ etc.• Identify data output, and data input and controls required foradditional facilities to support human performance andlearning, e.g. on-line help, use of software intelligent agentsetc.• Conduct modelling of the logical user-equipment interface,using Operability Scenarios, to ensure that all data andcontrol requirements are met, the dialogues are complete,and all requirements for simultaneous display of data andaccess to controls are identified.HFI ActivitiesOutputsLogical user-equipment interface descriptions for each option,comprising:• The dialogues defining data displayed,• Data inputs,• Control inputs,• User support data outputs and controls and• Requirements for simultaneous displays and access tocontrols.Nov 2006 Page 15-24 Issue 4
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MAP-01-011 HFI Technical Guide - Human Factors Integration ...

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