Thanks for your quick reply. Really appreciate it.
We have already set Preload option to "Always" as you have suggested.
As I understand, this helps in second and subsequent opens of a document (because it is Pre-Loaded during First Open). Moreover, even after using the above option, we still need to wait for 10 -15 seconds for the document to open. We are looking at reducing this time.
Please let us know if there is any other technique/practise to reduce the time taken for opening document.
Setting a simple startup tab is useful, kind of intro page with a logo an a textbox, although any time you change to another will take some time.
I don't know any other suggestions as loading time depends very much on the document, the number of expressions and objects and complexity of conditionals (use set analysis when possible instead), but on the data model as well, and I daren't to go any further.