Analysis Techniques For Man-Machine Systems Design

NATO UNCLASSIFIED- 79 AC/243(Panel-8)TR/7Volume 2Table 4.2:Example of information/action analysis- Mission segment: Aircraft approach to sonar dip positionFunction: 5.4.7 Engage /Monitor Automatic Flight Control System (AFCS) for Automatic Approachc, Task No. & Task Initiating Action response(s)lstimulus/information5.4.7.1 (a) Engage AFCS for automatic Pre-approach checks completed. Adjust AFCS for approach to dip.e approach Aircraft within automatic approach "Approach to dip" mode indication.profile criteria.Required approach profile. Actuate AFCS engage.AFCS operating status.AFCS "Approach to dip enabled"Proceduresindication.5.4.7.2 (b) Monitor a/c during automatic AFCS approach to dip. Monitor (visuaIaircraftapproachperformance.Aircraft flight parameters (transition).AFCS operating status.Aircraft movement rclative to desiredhover poinLTable 4.3:Example of action/information requirements analysisYMission segment: Aircraft approach to base.Function: 1.0 Initiate pre-approach proceduresAction requirements Information requirements Related information,sources. and problems1.0.1 Review approach information 1.0.1.1 Approach orientation. Position data1.0.1.2 Approach constraints: Approach path data:RequirementsCourse & path dataObstaclesObstacle locations-izardsTerrain characteristicses Weather Minimum decision altitudes1.0.2 Coordinate approach with 1.0.2.1 Communication: Coordination & confirmation ofcontrol Path dcsienation approach clearance.Limitations & constraints Altimeter settingEnvironmental conditionsAdvantagesUsers report the techniques to be fast and easy, providedthat the level of detail does not become excessive. It hasbeen found useful for deriving test criteria for mockupreviews and for some test & evaluation (T&E) activities.DisadvantagesThe analysis can become time-consuming if the level ofdetail is not controlled. Standardization of terms for tasksand information is recommended to avoid confusion.NATO UNCLASSIFIED- 79 -