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Drawing on years of design research in practice, we believe that a combination of observation and one-on-one interviews is the most effective and efficient tool in a designer s arsenal for gathering qualitative data about users and their goals. The technique of ethnographic interviews is a combination of immersive observation and directed interview techniques. Hugh Beyer and Karen Holtzblatt have pioneered an ethnographic interviewing technique that they call contextual inquiry. Their method has, for good reason, rapidly gained traction in the industry, and provides a sound basis for qualitative user research. It is described in detail in the first four chapters of their book, Contextual Design. Contextual inquiry methods closely parallel the methods described here, but with some subtle and important differences.

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Contextual inquiry, according to Beyer and Holtzblatt, is based on a masterapprentice model of learning: observing and asking questions of the user as if she is the master craftsman, and the interviewer the new apprentice. Beyer and Holtzblatt also enumerate four basic principles for engaging in ethnographic interviews:

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Context Rather than interviewing the user in a clean white room, it is important to interact with and observe the user in her normal work environment, or whatever physical context is appropriate for the product. Observing users as they perform activities and questioning them in their own environments, filled with the artifacts they use each day, can bring the all-important details of their behaviors to light. Partnership The interview and observation should take the tone of a collaborative exploration with the user, alternating between observation of work and discussion of its structure and details. Interpretation Much of the work of the designer is reading between the lines of facts gathered about users behaviors, their environment, and what they say. These facts must be taken together as a whole and analyzed by the designer to uncover the design implications. Interviewers must be careful, however, to avoid assumptions based on their own interpretation of the facts without verifying these assumptions with users.

5. Don t forget to check the log files to see the corresponding entries for these operations. 6. Configure all ports Up that you need or want to use for the exercises. Remember to save your configuration. 7. Repeat the preceding steps for each of the other routers. 8. (Optional) Is it possible to shut down/remove an MDA while ports are still active Do the ports retain their previous state when the MDA is reconfigured Try it! (Don t worry, there s no risk of damaging the hardware.) 9. (Optional) If you have access to the physical hardware, try inserting and removing cables from a port and using a show port at each step to see the difference in the output.

4: Understanding Users: Qualitative Research Focus Rather than coming to interviews with a set questionnaire or letting the interview wander aimlessly, the designer needs to subtly direct the interview so as to capture data relevant to design issues.

Now that you have completed this chapter, you should have a good understanding of the following topics. If you are not familiar with these topics, please go back and review the appropriate sections. The different types of Layer 2 protocols The basic functions of PPP, ATM, and TDM The different Ethernet frame types and how to differentiate them Ethernet addressing and operations, particularly CSMA/CD Understanding why full-duplex operations are important to Ethernet The different Ethernet physical cabling and speeds that are available

Contextual inquiry forms a solid theoretical foundation for qualitative research, but as a specific method it has some limitations and inefficiencies. The following process improvements, in our experience, result in a more highly leveraged research phase that better sets the stage for successful design:

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