1. Plans and Situated Actions September 9, 2005 SangJin Han (Team : TTA)

2. Two Questions ► What brings your actions? ► Is there any problem in communicating with machine? If so, why?

3. Lucy A. Suchman ► A sociologist and ethnomethodologist ► Interested in producing an adequate base of descriptions of human practices

4. Two alternative views of action i) The planning view The organization and significance of human action is located in underlying plans (Artificial Intelligence) ii) The situated actions view The prescriptive significance of intentions for situated actions is inherently vague (Ethnomethodology)

5. The planning view ► Plans are prerequisite to and prescribe actions at every level of detail ► Mutual intelligibility is a matter of reciprocal recognizability of our plans ► The planning view has to do with : –The planning model (Miller, 1960) –Speech act theory (Searle, 1969 ) –The idea of shared background knowledge as the common resource that is given (Durkheim, 1938)

6. Plans Actions

7. Definite!!! But…

8. The situated action view ► The prescriptive significance of intentions for situated action is inherently vague ► Improvisatory nature of human action ► Human action is contingent ► Plans are representations of situated actions ► Plans do not take sufficient account of the situatedness of most social behavior

9. Actor Plan Circumstances Action = f (plan, time, space, …)

10. Human vs. Machine ► Similarities - Reactivity - Linguistic style ► System’s differences to human behavior - System’s limited models of past, context, future - System’s limited perception of everyday media

11. … Indefinite Definite

12. HUMANHUMAN MACHINEMACHINE Asymmetry!!!

13. General Successful Design ► Deeply analyzed requirement ► Higher Modifiability ► Higher Modularity

14. Context Diagram of the previous TTA system Studio Project (TTCN-to-C compiler) Apply Logging System

15. Studio Project...More ► Adaptive to Multi language - Now, the language is only C ► Adaptive to Multi protocol - Now, the protocol is only the protocol used in WIBRO

16. Q & A