Data Modeling Sessions
Data Modeling Sessions
Creating a data model involves not only construction of the model, but also numerous fact-finding sessions (meetings) that uncover the data and processes used by a business. Running good sessions, like running good meetings of any kind, depends on a lot of preparation and real-time facilitation techniques. In general, modeling sessions should include the right mix of business and technical experts and should be facilitated. This means that modeling sessions are scheduled well in advance, carefully planned to cover sets of focused material, and orchestrated in such a way that the desired results are achieved.
When possible, it is highly recommended that modeling of function and data be done at the same time. This is because functional models tend to validate a data model and uncover new data requirements. This approach also ensures that the data model supports function requirements.
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Data Modeling Sessions
Session Roles
Formal, guided sessions, with defined roles for participants and agreed upon procedures and rules, are an absolute requirement. The following roles work well:
Facilitator
Acts as the session guide. This person is responsible for arranging the meetings and facilities, providing follow-up documentation, and intervening during sessions, as necessary, to keep sessions on track and to control the scope of the session.
Data Modeler
Leads the group through the process of developing and validating the model. The modeler develops the model, in real time if possible, in front of the group by asking pertinent questions that bring out the important details and recording the resulting structure for all to see. It is often possible (although somewhat difficult) for the same individual to play both facilitator and data modeler roles.
Data Analyst
Acts as the scribe for the session and records the definitions of all the entities and attributes that make up the model. Based on information from the business experts, the data analyst can also begin to package entities and attributes into subject areas, manageable and meaningful subsets of the complete data model.
Subject Matter Expert
Provides the business information needed to construct the model. You can have more than one subject matter experts. They are business experts, not systems experts.
Manager
Participates in the sessions in an assigned role (facilitator, subject matter expert, and so on) but has the additional responsibility of making decisions as needed to keep the process moving. The manager has the responsibility of “breaking ties” but only when absolutely necessary. The manager can be from either the systems or business community.
14 Methods Guide