We are using Smartsheet as a manufacturing/production planning tool. I've created a sheet format that allows us to do exactly that, with tasks for individuals involving dependencies on other parts/processes. For example, a part is routed to engineering for design, the engineering manager for approval, purchasing to order material, machining, assembly, shipping, etc. This works fine, until there is an interruption in the process. Say R&D need a part made last minute, what would be a best practice to document this in Smartsheet so that essentially lag time can be inserted in the middle of a task?