EcosimPro is a simulation tool developed by Empresarios Agrupados A.I.E for modelling simple and complex physical processes that can be expressed in terms of Differential algebraic equations or Ordinary differential equations and Discrete event simulation.

This tool employs a set of libraries containing various types of components (mechanical, electrical, pneumatic, hydraulic, etc.)

[3][4] The EcosimPro Tool Project began in 1989 with funds from the European Space Agency (ESA) and with the goal of simulating environmental control and life support systems for crewed spacecraft,[4] such as the Hermes shuttle.

The multidisciplinary nature of this modelling tool led to its use in many other disciplines, including fluid mechanics, chemical processing, control, energy, propulsion and flight dynamics.

It solves the following differential equation to introduce a delay to variable x: which is equivalent to where x and y have a time dependence that will be defined in the experiment.