# How to start ### Prepare the assessment The evaluator should do a previous interview to the worker who is going to be evaluated in order to understand the job tasks and observe several times the movements and postures of the worker during the work cycles of the activity. Related to the job task that should be evaluated, it is important to choose it with the following criteria: * The most difficult postures and work tasks (given by the previous analysis) * The posture performed for the longest period of time * The posture where the highest force loads occurs. After this previous analysis, it is possible to start the assessment of the level of MSD risk in a certain job task in the tool. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://virtualfactory.gitbook.io/vlft/tools/rula/how-to-start.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.