Re: can I update from Winter 14 to latest revision without going through Spring 14?
Thanks for your question. To directly answer your question, yes. ServiceMax update releases are cumulative and as such, if you upgraded to Summer '15 directly, you would get all of the interim updates without going through the upgrade process. Please review the available Release Notes and version updates videos, etc., so that you are familiar with the newer features that have been added since your version.