**4. Methodology to Systematically Identify and Characterize Energy Flexibility Measures**

The development of the proposed methodology started by establishing specific requirements that must be fulfilled. These requirements are:


Based on the previously defined requirements, the steps presented in Figure 4 constitute the proposed methodology to identify and characterize EFMs in industrial systems. Each step is detailed in the following subsections.

**Figure 4.** Steps to identify and characterize EFMs.
