Questionnaire is one of the techniques available for requirements elicitation. A questionnaire is a document used to guide one or more people to answer one or more questions. The elaboration of a questionnaire is a process more complex than it can make look like. A questionnaire that is not well formulated can lead to unreliable information and may be harmful to the project in question. Although there is no standard method for the construction of questionnaires, there are recommendations from diverse authors with regard to this important task in the process of eliciting information. The work presented here details a technique for identifying the necessary and common stages for the creation of a questionnaire. A method for the construction of questions is proposed, which uses as base a list of requirements for the construction of quality questionnaires, obtained from the literature in the areas of social sciences and marketing. A tool for the elicitation of software requirements, by means of questionnaires is presented.