The results indicate that providers assume this process as unstructured, context-aware, expert-based and with various possible outcomes. This article presents an exploratory study that uses a mixed method approach to gain knowledge on these aspects. Few is reported about the RE activities performed in practice by providers, the cost-effectiveness of the process, and the software practices used to support it. These constraints make this process unique, and different to the RE conducted at post-selling i.e., during a project contract. For instance, the process must be done quickly, under a competition situation, and hopefully involving few resources since its cost is assumed by the provider. In bespoke projects, this process requires that providers deal with several constraints that are usually not present in a regular RE process. Performing requirements engineering (RE) during the pre-contract stage i.e., at pre-selling time, is mandatory for software providers to conceive a project proposal and deliver a bid.
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