PATTERN 4: ACCOUNTING FOR AN UNSEEN ARTEFACT

Essence of the Pattern:

Basic summary details

Why Useful?

Why drawn attention to

Where Used?

The pattern has been documented in two settings so far. One setting - telephone banking - is seen as a successful example of the pattern while the other - 911 emergency services. - is seen as problematic. The focus is on the practices employed to make the system and the actor's interaction with it visible. These are multiple in one setting and fairly non-existent in the other. Both are broadly speaking, customer service situations where the operator interacts with a system while speaking to a customer/caller.

This pattern is illustrated with vignettes from the following field work:

* TelephoneBanking. An instance where the accounting for an unseen computer system is successful in promoting better mutual orientation to the system and the process between a call operator.

* 911EmergencyServices. An instance where a 911 caller is clearly not oriented to the system requirements for logging a call and the operator does little to promote them.

Dependability Implications

What mean for dependability and design