Evaluation of the CDTI CS 247B / MS

1
Evaluation of the CDTI CS 247B / MSE 430
(Pamela Hinds)NASA Ames (Richard Mogford)

• Honor Gunday
• Joe Sacco
• Luke Swartz
• Stanford University
• www.stanford.edu/lswartz/cs247b

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CDTI

• Now cant see other planes
• Cockpit Display of Traffic Information
• situation awareness of other planes
• locations
• altitudes
• intentions
• route changes

3
Free Flight

• Now all adjustments need approval, handoffs from
  one controller to another (see handout)
• Free flight during en route, let pilots make
  their own course changes

4
Methodology and Process

• Interviews
• 5 pilots, 4 controllers
• Pilots not in workspace
• Observations
• Prototype testing
• Oakland TRACON
• Design Meetings and Focus Groups

5
Pilots Work (now)

• Drawings PFD and Nav Display
• Flight Management System (FMS)
• En route
• generally quiet
• route change requests usually granted

6
Controllers Work (now)

• Environment
• laid back, fun
• love their job
• pride
• Having a deal
• Unexpected events

7
Pilots Work (free flight)

• Over-water versus over-land
• Worried about
• time
• distractions
• attention
• safety
• General Aviation pilot didnt want
  self-separation responsibility either

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Controllers Work (free flight)

• Want clear responsibilities
• all or nothing
• Concern over efficiency
• will this actually help?
• free flight might actually make things worse!

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Interface Observations

• Not the subject of our course, but
• CDTI display itself liked, seemed easy to use
  (based on ND)
• Bar on bottom of CDTI perceived as hard to use
• Feedback on sending flight plans?
• Toggle switches (e.g. pulse)?

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Process Recommendations

• Subjects
• lab rats become very well trained
• Simulation
• currently distracting, problems of validity?
• Mindset
• demonstration, not an experiment

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Design Principles for Pilots

• Fit into physical workspace
• Shouldnt increase workload substantially, or
  require constant attention
• Present pertinent info

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Design Principles for Controllers

• High attention, short time
• (active vs. passiveness)
• Present visually
• Handoff-able deal with unexpected situations,
  error
• Clear roles and responsibilities (distributed,
  not shared)

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How does the CDTI do?
CDTI Free flight
Fit into physical workspace ? ?
Shouldnt require constant attention ? ?
Present pertinent info ? ?
High, short-term active attention ? ?
Visual display of information ? ?
Handoff-able, can deal with unplanned/extraordinary events ? ?
Clear responsiblities ? ?
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High-Level Recommendations

• What is the motivation behind CDTI and free
  flight?
• Pilot skepticism how busy are they?
• Controller skepticism this will make it
  slower!
• FAA, controllers, NASA, pilotsand airlines

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High-Level Recommendation

• CDTI can be (best?) used without free flight
• Further ensure safety
• Reduce workload on controllers without changing
  roles
• Get rid of FMS?
• Only free flight over water?
• Presentation to pilots

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Questions?
www.stanford.edu/lswartz/cs247b