Meghna Krishnan

1
Dispatchers Rescue
Meghna Krishnan Rahul Nair Kedar A. Shiroor
2
Introduction

• What is the Stingerette
• Why this project?
• Quandary of the Dispatcher

3
User Environment Analysis

• Dispatcher
• Drivers
• Students
• Surrounding Environment
• Computer, Radio, Telephone
• Constant Disturbances

4
Current System
5
Design Requirements

• Speed! Speed! Speed!
• Reduced workload
• Typing
• Recall
• More efficient operation
• Robustness
• Actual deployment

6
Overview of Design

• Design Features
• Map Interface
• Dual Monitor
• GPS
• Voice Input
• Discarded Design Components
• In-car display, Input via Stylus, Voice
  assistant, Smart board, Text entry and
  Hierarchical menu system for callers.
• Cost and practicality hampered deployment.

7
Prototype Call listing
8
Prototype Map interface
9
Interaction on Map Display
10
Usability Evaluation

• 2 Groups (10 users)
• 2 Dispatchers
• 8 Students (good campus knowledge)
• Training (Demonstrate basic functionality)
• 10 Benchmark Tasks
• Time for each task
• Errors
• Questionnaires
• Pre-Session
• Post-Session
• Interview

11
Expectations vs. Results

• Faster
• Need time to learn
• Problems with one handed use
• Difficulty with Vehicle layout

• Yes
• Yes
• No
• No (8/10)

12
Interface
13
User Suggestions Comments

• Dispatchers
• Mapping Bus Routes
• Highlight frequent locations
• No Voice!!
• Students
• Swap vehicle no. with driver no.
• Bigger vehicle icons on map
• Building names instead of numbers
• Increase size of map
• Change map orientation

14
Conclusions

• Speed thrills!!
• Primary Users loved it
• Actual Deployment (without GPS)
• Future Design Iterations
• Make the Interface User Modifiable
• Integrate GPS with the system
• Improve map

15
Questions?