Control - Human Resource - Lecture Slides, Slides of Human Resource Management

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control

• open loop control

– no feedback

– fragile

control

system

environment

actions

control

• open loop control

– no feedback

– fragile

• closed loop control

– uses feedback

– robust

control

system

environment

actions

feedback

adding information (ctd)

information required when

• subtask involves input (or output)
• some kind of choice (how to know what to do)
• subtask repeated (but iterations unspecified)

sources of information

i. part of existing task (e.g. phone number entered) ii. user remembers it (e.g. recall number after directory enquiry) iii. on device display (e.g. PDA address book, then dial) iv. in the environment

• pre-existing (e.g. phone directory)
• created in task (e.g. write number down on paper)

GUI easy (lots of space) mobile/PDA need to think

triggers

process – what happens and order

get post from pigeon hole

bring post to desk open post

common triggers

• immediate

• straight after previous task

• temporal

• at a particular time

• sporadic

• when someone thinks of it!

• external event

• when something happens, e.g. phone call

• environmental cue

• something prompts action … artefacts

artefacts

• ethnographic studies

• as shared representation

• as focus of activity

• act as triggers, information sources, etc.

where are you?

1. controller choose new flight level 2. controller tell pilot new flight level 3. pilot confirm new flight level 4. pilot ascend to new level

new flight level achieved