The overlapping must be defined in the routing when entering work operations. If an operation starts before the previous one has ended, a checkbox "Overlap" must be checked. When checked, it is asked to enter the quantity. This field specifies the number of products that must be ready in the previous operation when the next operation begins. Specifying this as zero would mean complete overlapping, parallel execution.
For production orders in the chart "Sequence", it is possible to specify the number of the operations that precede the operation (with or without overlapping).