EXERCISE 15.11 [extra - not in book]
This question relates to the train both scenario.
The figure below shows an incorrect Hierarchical Task Analysis for the task of catching a train using the train booth described in the Train Booth Example.
- List any errors/omissions. (Note tasks 1, 3 and 4 are deliberately not expanded to focus on use of train booth)
- Fix the errors/omissions found
answer available for tutors only
Missing Plan 2.
Task 220.127.116.11.1 should be a sub-task of 2.1.1 in sequence after 18.104.22.168; this is an example of sub-task / sequence confusion.
We have a 'remove' action for the Gold Card but no corresponding 'insert'.
- Corrected diagram (indicative) below.
And plans (indicative):
do 2.1 – 2.2 – 2.3 – 2.4
do 2.2.1 – 2.2.2
do 22.214.171.124 – 126.96.36.199
if OK do 2.3.2, 2.3.3
Other exercises in this chapter
ex.15.1 (ans), ex.15.2 (ans), ex.15.3 (ans), ex.15.4 (ans), ex.15.5 (ans), ex.15.6 (tut), ex.15.7 (open), ex.15.8 (open), ex.15.9 (tut), ex.15.10 (tut), ex.15.11 (tut)
all exercises for this chapter