Mini lecture notes, class 3 Course organization [3
Mini lecture notes, class 3 Course organization [3 min] got group members? (put group number on hwk) got the book?
Lego exercise [5+5] Reprise Kegworth [15min] How to read a book, 5.2.3 (PQ4R) [10min] So, preview preface, and preview conclusions soon Chapter 1  why study the user?
risk better design help you be a team member/user
ABCS not covered: emotions, esthetics when? How much do you have to study the user? Chapter 2  CHI, HCI, HF, cog. Ergonomics, systems, user-centered design
Course project reminder [20 min.] What causes a plane to crash? A laundry list is required, or, a swiss cheese loaf lined up A lot, in safety critical systems Kegworth Air Disaster Why?
Near Ritter, Baxter & Churchill A lovely example Often used Storyline Flight, jan 1989, Heathrow to Belfast, Midland 192 Experienced pilots, new plane (737) Part of one of the safest systems in the world
Upon take-off, no problems Shuddering, fire in an engine at ~10 min. Shut off #2 engine, RHS (the good one!) This is the pilot error Hardware and Mischance badly designed new engine, failure at 3 months, approx. t=300 h, should be t=500,000 h, not tested at altitude /unlucky choice of diversion airport
[BMI hub] Auto throttle problem poor mental model of plane [system] (turned off good engine, which disengaged autothrottle, solving the judder problem) lack of engine feedback [interface design] Vibration Dial 1
vibration dial harder to read [design] vibration dial not required to fly [regulation] dial and plane not trained with simulator technology updated but not announced Vibration Dial 2 vibration dial small [design] Without range
marking [design] During descent lots of interruptions pilots cant see the engines no protocol: no checking/confirmation visually from cabin Passengers could see fire but explained it away, perhaps also flight attendants
diffusion of social responsibilities Social distance between aircrew and pilots crash 900 m short 43+4 out of 118+8 die +1 in 2012 (PTSD) At crash Not documented: noise abatement hillocks
Afterwards If any 13or 3 missing, no loss of life What was the pilot error? Thus, systems require understanding people, technology, and systems and environment References Wikipedia on kegworth
BBC. (1991). Fatal error: Taking liberties [television series]. Youtube has videos as well How to read a book, 5.2.3 (PQ4R) So, preview preface, and preview conclusions soon 1.3 So, when to study the user?
Fundamental attribution error of design More usable $$ Safer Risk driven Not like you
Lives at risk Know enough given cost of knowing more (satisficing) The ABCS Anthropometrics Behavioral The senses Motivation
Cognition Social System The system (pre-HCI) The system and user (early HCI) The system and what we know about the user (U-CS)
Another way to organize the user The system (pre-HCI) The system and user (early HCI) The system and what we know about the user (U-CS) Chapter 2
QuickTime and a decompressor are needed to see this picture.
Develop Discrepancy. Current behavior versus future goals. Example: " Sometimes eating is the best way to make stress go away. But then you get on the scale, and feel uncomfortable in your clothes, and hate the way you look in...
Seller will provide and maintain a quality control system acceptable to Buyer or the Government, where applicable, for the goods and services purchased under this order, and Seller will permit Buyer or the Government, where applicable, to review procedures, practices,...
Answers to WU #8 -9,-6, 0,4,31 -4,-1,0,3,14 < > 9 2.2 Rational Numbers Objectives: To show that a number is a rational # To graph rational #'s To compare rational #'s using < or > Classes of Numbers Rational Numbers...
Individuals forced to attend AA, often by the judicial system, may find AA difficult to accept and, because coerced attendance is a violation of the membership requirement of "a desire to stop drinking" (Twelve Steps & Twelve Traditions, 1952), such...
2 The four original settlements of Providence, Portsmouth, Warwick and Newport created a united government in 1647 under the name "Providence Plantations." 3 Called New Netherland until 1664 when the English took it from the Dutch. 4 Settled in 1638...
Ask them about the 7 life processes that lead this to happen. This slide can easily be removed, but it helps consolidate pupils knowledge about the seven life processes applied to sharks. There is a printable version of this slide...