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

MAP-01-011 – HFI Technical Guide (STGP 11)15.3.2.6 Specify Operability CriteriaPurposeInputsTo specify parameters of user performance that must beachievable using the user-equipment interface.Products from:• Critical User Performance Criteria (Sect 15.3.2.2) and• Logical User-Equipment Interface (Sect 15.3.2.4).Methods • Operability Criteria Definition.StepsWhereas the goal of developing a consistent user interface isdealt with through the use of a Style Guide, this HFI activityidentifies the user performance objectives that must besupported by the design.• Identify each dialogue defined in the logical user-equipmentinterface.• Identify critical user performance to be achieved through theuse of each dialogue.• Develop quantitative, achievable and testable metrics todefine the operability parameters for each dialogue e.g. ‘theuser must be able to acknowledge and respond to a threatwithin X seconds’ (where X is defined as the maximum timeallowed for a response if the required level of overallequipment efficiency and effectiveness is to be achieved).• Identify general Operability Criteria for the user-equipmentinterface, e.g. ‘a user must be able to select contextdependenthelp for any object within Y seconds’.Outputs • Operability criteria for each dialogue in each equipmentoption.HFI ActivitiesNov 2006 Page 15-26 Issue 4