Experts in requirements elicitation have interviews to stakeholders using various levels of knowledge to grasp and elicit user's requirements. This paper analyzes interview processes of these experts and explores a computation model for simulating them. This model can be used to navigate novice analysts' interview processes. It is a mixture consisting of a blackboard model and a state transition model in order to narrow the candidates for the questions that an expert analyst will ask the stakeholders next in the interview process. The candidates are selected based on the information that has been elicited from the stakeholders until now, and the blackboard model is for holding this information in the form of IEEE 830, a standard form of requirements specification documents. We have analyzed the experts' interview processes and constructed the instance of the computation model in sales management domain. And we recorded novices' processes, simulated it on the novices' ones, and showed that we could improve them by means of the model.