If you choose Constraints…, an Import Constraints window will appear allowing you to Merge, Replace or Overwrite any
existing constraints. Choose the options very carefully so as to not corrupt your existing design (and always have a backup of
your design)
ɢ If you choose to import a technology file, that will include constraints and additional data, like cross-sections
ɢ In either scenario, select your file then click Open
ɢ Constraint Manager will update itself and the design based on what you chose to import
Benefits of exporting and importing constraints:
f
Reusability: Engineers can apply consistent constraints across multiple designs or projects, saving time and ensuring
design consistency
f
Collaboration: Team members can share constraint sets, promoting standardization across the organization
f
Version control: Constraint files can be versioned and stored separately from design files, allowing for easier management
of design rules
f
Efficiency: Reduces the need to recreate complex constraint sets for each new design, potentially saving significant time
and effort
While importing predefined constraints can be highly beneficial, engineers may still need to review and adjust them for
specific project requirements. The practice of starting with a standard set of constraints and then customizing as needed
often strikes a good balance between efficiency and design optimization.
8 www.cadence.com
OrCAD X Constraint Management Guide
