In the CAD world, what must engineers focus on in
order to be more productive?

I think it is very important to have a tool to quickly view drawings, such as the recently launched TsridiopenT,It is a technical communication software for viewing, sharing, annotating and communicating drawings by mobile phone. It supports app, browser and PC, and supports more than 40 kinds of 3D models and 2D drawings. 

Check the details:https://tsridiopen.com/features.html