Cooper Harper Handling Qualities Rating Scale Adequacy for Selected Task Aircraft Demands on the pilot in Selected pilot or Required Operation Characteristics Task or Required Operation Rating Excellent Pilot compensation not a factor for Highly desirable ormance Pilot compensation not a factor for Negligible deficiencies desired performance Far· Some mildly Minimal pilot compensation required for unpleasant deficiencies desired performance Minor but annoying Desired performance requires moderate deficiencies Is it Deficiencies satisfactory without warrant Moderately objectionable Adequate performance requires improvement deficiencies considerable pilot compensat Very objectionable but Adequate performance requires extensive tolerable deficiencies pilot compensation Major deficiencies Adequate performance not attainable with Is adequat maximum tolerable pilot compensation rformance Deficiencies warrant Major deficiencies Considerable pilot compensation is equired for control workload Major deficiencies Intense pilot compensation is required to retain control Ye Improvement Control will be lost during some portion controllable? mandatory Major deficiencies of required operation Definition of required operation involves designation of flight Pilot decisions phase and/or subphases with accompanying conditions. Sourcehttp:/history.nasagov/sp-3300
System Supervisory Control Computer Interface Display Control Sensors Direct Observation Cooper Harper Source: http://history.nasa.gov/SP-3300
Bedford scale The Bedford Scale is a uni-dimensional rating scale designed to identify operator's spare mental capacity while completing a task. The single dimension is assessed using a hierarchical decision tree that guides the operator through a ten-point rating scale, each point of which is accompanied by a descriptor of the associated level of workload. It is simple, quick and easy to apply in situ to assess task load in high workload environments, but it does not have a diagnostic capability. Refs: Roscoe and Ellis. 199 Source:Eurocontrolhttp://www.eurocontrolint/leatmp/hifa/hifa/hifadatatoolsworkloadhtm
Interface System Supervisory Control Computer Display Control Sensors Direct Observation Bedford Scale ü The Bedford Scale is a uni-dimensional rating scale designed to identify operator's spare mental capacity while completing a task. The single dimension is assessed using a hierarchical decision tree that guides the operator through a ten-point rating scale, each point of which is accompanied by a descriptor of the associated level of workload. It is simple, quick and easy to apply in situ to assess task load in high workload environments, but it does not have a diagnostic capability. ü Refs: Roscoe and Ellis, 199 Source: Eurocontrol http://www.eurocontrol.int/eatmp/hifa/hifa/HIFAdata_tools_workload.html
Rate of perceived exertion Borg rPe scale 6 No exertion at all Borg rate of perceived Exertion 7 Extremely Light Scale 9 Very Light Originally developed for physical workload 11 Light Intended to be ordinal scale Modified 0-10 version CR-10 13 Somewhat hard 14 ·15Hard( Heavy) 17 Very hard 19 Extremely Hard ·20 Maxima| Exertion Sourcehttp://dticam.dtic.mil
Interface System Supervisory Control Computer Display Control Sensors Direct Observation Rate of Perceived Exertion Borg RPE Scale ü 6 No exertion at all ü 7 Extremely Light ü 8 ü 9 Very Light ü 10 ü 11 Light ü 12 ü 13 Somewhat Hard ü 14 ü 15 Hard (Heavy) ü 16 ü 17 Very Hard ü 18 ü 19 Extremely Hard ü 20 Maximal Exertion ü Borg Rate of Perceived Exertion Scale ü Originally developed for physical workload ü Intended to be ordinal scale ü Modified 0-10 version CR-10 Source: http://dticam.dtic.mil
NASA TLX Task load index Sandy hart 5 Element Structured Subjective Assessment Individual relative element calibration Requires trained Users 800 Often used but difficult to interpet http://www.hf.faagov/ebtraining/cognition/orkload/mental3.htm
Interface NASA TLX Task Load Index System Supervisory Control Computer Display Control Sensors Direct Observation ü Sandy Hart ü 5 Element Structured Subjective Assessment ü Individual relative element calibration ü Requires Trained Users ü Often used but difficult to interpert http://www.hf.faa.gov/Webtraining/Cognition/Workload/Mental3.htm
DRAWS DRAWS is a multi-dimensional tool (similar to NASA TLX) used to gain a subjective assessment of workload from operators The rating scales are input demand(demand from the acquisition of information from external sources), central demand (demand from mental operations), output demand (demand from the responses required by the task ) and time pressure(demand from the rate at which tasks must be performed ) DRAWS offers ease of data collection and ratings can be obtained during task performance by asking respondent to call out ratings(from0 to 100 to verbal prompts. This can also provide a workload profile through a task sequence Refs: Farmer et al. 1995: Jordan et al. 1995 Source:Eurocontrolhttp://www.eurocontrolint/leatmp/hifa/hifa/hifadatatoolsworkload.html
Interface System Supervisory Control Computer Display Control Sensors Direct Observation DRAWS ü DRAWS is a multi-dimensional tool (similar to NASA TLX) used to gain a subjective assessment of workload from operators. The rating scales are input demand (demand from the acquisition of information from external sources), central demand (demand from mental operations), output demand (demand from the responses required by the task), and time pressure (demand from the rate at which tasks must be performed). DRAWS offers ease of data collection and ratings can be obtained during task performance by asking respondent to call out ratings (from 0 to 100) to verbal prompts. This can also provide a workload profile through a task sequence. ü Refs: Farmer et al, 1995; Jordan et al, 1995. Source: Eurocontrol http://www.eurocontrol.int/eatmp/hifa/hifa/HIFAdata_tools_workload.html