Sissi Wang, Jennifer Wong, Song Yang

Problem Lead users User needs Existing solutions Concept generation Concept evaluation Final design Limitations

Passengers congregate near entrances/exits on subway platforms during high trac

Areas of high density cause increased train boarding times

Lead users: Law enforcement Military Daily TTC commuters

Law enforcement and military extreme cases of crowd control

Daily TTC commuters encounters crowding more often than general population

A focus group was used to identify the needs of frequent TTC commuters

3 major user needs identied: Eectiveness

Time for all passengers to board the train Comfort

Minimum distance between user and others Amount of sensory discomfort

Accessibility Amount of clearance available

Physical barriers Eective control, poor accessibility

Signage and announcements Not eective since passive

Law enforcement equipment (high-frequency audio, concentrated heat) Eective control, but harmful

Change the texture of the oor near entrances/exits, making it less desirable to stand on

Base case: LCD signs (animation and text)

Substitute Substitute vision with other senses, then...

Magnify Increase intensity: Visual Strobe lights Aural Directed impulse signals Temperature Directed heat lamps at entrances/exits

15) Principle of Dynamism:

See-saw platform: takes advantage of peoples preference for at, balanced surfaces

1. open: Sodium channels open when the Na + concentration is much higher outside than inside

One-way turnstiles

2. "spread": Microscopic channels which traverse cell walls, enabling transport. Discretized platform

Criteria A B C D E F Row Total Weights

A) Accessibility - 0 1 0 1 0 2 0.13

B) Eectiveness 1 - 1 0 1 1 4 0.27

C) Comfort 0 0 - 0 1 1 2 0.13

D) Cost 1 1 0 - 1 1 4 0.27

E) Durability 0 1 0 0 - 1 2 0.13

F) Adaptability 1 0 0 0 0 - 1 0.07

TOTAL 15 1

Textured Floor

Aggressive solutions

See-saw platform Turnstiles

Discretized platform

Criteria Rating

A) Accessibility 0.26 0.26 0.26 0.13 0.26

B) Eectiveness

0.27 0.81 0.54 0.81 0.54

C) Comfort 0.26 0.13 0.13 0.26 0.39

D) Cost 0.81 0.27 0.27 0.54 0.81

E) Durability 0.39 0.39 0.26 0.39 0.26

F) Adaptability 0.21 0.14 0.14 0.21 0.21

TOTAL 2.2 2 1.6 2.34 2.47

Criteria Std Textured oor

Aggressive solutions

See-saw platform

Turnstiles Discretized platform

Accessibility - 0 - 0 0

Eectiveness + + + + +

Comfort - - - 0 0

Cost 0 - - - -

Durability 0 0 0 + 0

Adaptability 0 0 0 0 0

Sum (+) 1 1 1 2 1

Sum (-) 2 2 3 1 1

Sum (0) 3 3 2 3 4

TOTAL -1 -1 -2 +1 0

Standard: TTC signage/PA broadcasts

Concepts Weighted Decision Matrix Pugh Chart

Textured oor 2.2 -1

Aggressive solutions 2 -1

See-saw platform 1.6 -2

Turnstiles 2.34 +1

Discretized platform 2.47 0

Discretized platform and turnstiles Ranked high in eectiveness and cost

Aggressive solutions and see-saw platform Ranked low in cost and comfort

Objectives: Adjustable length Easy to move around

Along platform edge: secure with vice Along platform surface: secure with suction (vacuum) lock

Secure panels with torx security screws

Cross-sectional view Side view

1 m 1 m

3 m 0.06 m

Material: Aluminum Total mass: 113.4 kg Material cost: $219.54

Advantages over existing solutions:

Provides more accessibility than current physical barriers

Less intrusive and harmful than law enforcement equipment

Product potential:

Applications beyond TTC platforms due to Adjustable length Ability to be secured onto any protruding edge

Low material cost

Easy to implement

Limitations: Users can fail to follow instructions Cannot see where empty sections are

Possible improvements: Use with LCD screens Include grooves/rollers at the base of each panel to reduce friction during extension

Pugh Chart Pairwise comparisons to determine objective weights may fail due to inconsistent logic

Assumption that every objective is equally important

Weighted decision matrix Scoring system was a 3-point scale, could have ner granularity given more information

Textured Floor Aggressive solutions

Criteria Weight Factor Score Rating Score Rating

A) Accessibility 0.13 2 0.26 2 0.26

B) Eectiveness 0.27 1 0.27 3 0.81

C) Comfort 0.13 2 0.26 1 0.13

D) Cost 0.27 3 0.81 1 0.27

E) Durability 0.13 3 0.39 3 0.39

F) Adaptability 0.07 3 0.21 2 0.14

TOTAL 1 2.2 2

1 = Poor, 2 = Fair, 3 = Good

See-saw platform Turnstiles

Criteria Weight Factor Score Rating Score Rating

A) Accessibility 0.13 2 0.26 1 0.13

B) Eectiveness 0.27 2 0.54 3 0.81

C) Comfort 0.13 1 0.13 2 0.26

D) Cost 0.27 1 0.27 2 0.54

E) Durability 0.13 2 0.26 3 0.39

F) Adaptability 0.07 2 0.14 3 0.21

TOTAL 1 1.6 2.34

1 = Poor, 2 = Fair, 3 = Good

Discretized platform

Criteria Weight Factor Score Rating

A) Accessibility 0.13 2 0.26

B) Eectiveness 0.27 2 0.54

C) Comfort 0.13 3 0.39

D) Cost 0.27 3 0.81

E) Durability 0.13 2 0.26

F) Adaptability 0.07 3 0.21

TOTAL 1 2.47

1 = Poor, 2 = Fair, 3 = Good