* How does a manufacturing engineer get access to a lightweight file?
* How does he/she know they are getting access to the right revision, and that nothing changed while they were in the process of reviewing it?
* How does the same engineer ensure his feedback gets back to the right person?
* Where are the files and markups tracked and managed for future reference? 2 years down the road how will a manufacturing company be able to figure out who made a design change, and why?
Also consider that most 3D viewers do have some level of Bill of Materials (BOM) support, but it is typically limited to what the native 3D CAD system writes out i.e. a Design BOM (3D parts and assemblies) and not the Engineering BOM (including other relevant information such as non-drawn items and additional properties).
Well, you can probably see where I'm going with this and it shouldn't be a big surprise given this is the DM blog - n'est pas? Productstream is tightly integrated with Design Review out of the box, ensuring that customers like you not only get the tool (Design Review) but also the managed process (via Productstream) that is absolutely critical to improving design efficiency through a managed environment. Productstream ensures that:
* Design data is routed to the right people at the right time for review whether it's an initial design release or an engineering change
* No one ever works on out of date revisions
* Mark-ups are routed to the people who can actually evaluate the impact of change and execute the work if approved
* All information (mark-ups, comments, change notes) are tracked, managed and always accessible
So at the end of the day the pundits can blabber on about what individual vendors of viewer technology are doing, but unless you take a holistic view of the process you'll only ever see point productivity gains and miss out on the big picture improvements a properly managed environment can bring.