Developing a knowledge-based version of a greenhouse design and simulation tools, DAMOCIA-Design and DAMOCIA-Sim, we realized the convenience of using multiple diagrammatic notations, and their advantages. First, we used an extension of the Task-Method Diagrams of the CommonKADS methodology to model the relation between the different tasks to be done and the methods we could use to solve them. Method Flux Diagrams model the relation between the different elements composing the method. In order to implement the design software, we selected a distributed architecture, DACAS, that integrated agents using behavior definitions. These are modeled as execution plan diagrams. In this work, we present how these execution plan diagrams can be generated in a general way from task-method and method-flux diagrams included into the knowledge model of the system.