You might have a part where the exact tools needed to manufacture the part or the exact material thicknesses to define the stock material are not available in the template. In those cases, the Costing tool tries to approximate the nearest tool or material thickness defined in the template, and a warning symbol appears in the CostingManager or Task Pane.
For example, if no thickness values in the template match the part thickness, the software selects the closest thickness value in the template and displays a warning icon , indicating that the thicknesses differ. This way you get an estimate without having to update the template.