When planning construction stages, objects are assigned the specification at which point in time they are to be included or removed during implementation, as an additional attribute. Since the preceding construction stage forms the basis of every construction stage, subsequent changes of a construction stage must be traced correspondingly for all following actions.

In ProSig® all construction stages are normally recorded in a drawing. Colour assignment (red / yellow) as well as the presentation are implemented by an intelligent level management system. In this way the effort as well as the risk of inconsistency in case of subsequent changes is minimised.

• Marking of elements for insertion or removal (red / yellow)
• Management of an arbitrary number of construction stages within a drawing
• Focused presentation of individual construction stages
• Automatic tracing of subsequent changes in all following construction stages