The Lyee methodology allows the development of a software by simply defining its requirements. More precisely, a developer has only to provide words, calculation formulae, calculation conditions and layout of screens and printouts, and then leaves in the hands of the computer all subsequent troublesome programming process, i.e. control logic aspects. The formalization of Lyee methodology led to the definition of Lyee-Calculus, a formal process algebra, that easily and naturally supports the basic concepts of the Lyee methodology. Moreover, we provided an implementation of the constructs of the Lyee-Calculus in Java language in order to concretely show the efficiency of this calculus and its suitability for the Lyee methodology. In other words, this Java implementation of the Lyee-Calculus provides a means of bridging the gap between Lyee requirement specifications and their implementations.

In this paper, we present a new software development environment, LyeeBuilder, that allows to automatically generate applications from specifications using a GUI interface. This software aims to give to programmers an environment that allows them to automatically generate applications from screens and word definitions.