advantage and disadvantage of cad cam training

Advantage and disadvantage of 2D CAD CAM designing 

A few advantages of 2D CAD:
Reduced design timescales.
Reuse of designs.
Drawing errors can be corrected easily.
Drawings can be sent/received via email in seconds.

Disadvantages:
Time & cost of implementing the CAD system
Time & cost of training people to use the CAD.
Time & cost of migrating legacy drawings into CAD format

Advantage and disadvantage of 3D CAD CAM designing

If you compare the use of 3D CAD against drawing borard draughting. the list of disadvantages pretty much stays the same, whilst the list of advantages grows further.

Advantages of 3D CAD designing :
More stylish /complex products can be designed using 3D surfacing.
Parametric modelling allows many design itterations to be generated & evaluated quickly.
Designs can be analysed and optimised virtually using finite element analysis.
Clearance/inteference checks can be mase easily
3D CAD data can be imported directly in to CAM software, futher reducing timescales and mistakes from interpretation of 2D drawings.