Notes on 'Default' Clash Set: The defaults on this form for new clash sets can be defined by a 'Default' clash set, or by environment variables. The 'Default' clash set method is recommended because using environment variables in a windows environment is particularity user-unfriendly and does not promote re-use of the default data between users of the same project. Also, users may have different environment variables, or access the common database from different installations of the software, served from different file servers.

Notes on Personal Clash Set: During the Clash Check CE process, the form is used to enter details of a personal clash set. This clash set is used for EVERY clash check of the CE in the particular MDB and, consequently, the default values should be used wherever possible. The Title and MDB fields are read-only. The Check List is automatically completed with details of the group element of the CE. Entries can be made in the Obstruction and Exclude lists, but it is recommended that neither is populated. In these circumstances the Obstruction list defaults to ALL and the Exclude list remains empty.

Note on modified checklist items option: some PDMS ADMIN options, including merge (compress) and reconfigure, flag every element as having possibly changed geometry. To obtain maximum benefit from ‘Clash Check Modified Elements Only’ a full Clash Check will need to be executed after use of these options.