Available PDM packages & choice factors

Commonly available PDM / PLM Systems in market are
-- Solid Edge Insight
-- TeamCenter Express .( Launching in first quarter of 2006 )
-- TeamCenter Engineering
-- Smart Team.
and more ...

These PDM Packages are chosen based on the relevance & applicability to an organization.
Some of the factors used for making a choice are.
- Nature of data to be managed.
- Type of CAD environment.
- Single or Multilocation environment
- Integration required with other systems
& Most important is the Cost to Need & ROI ( Return on Investment ) consideration.