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From the Global Platform 2.1.1 specification, I learned that there are three application life cycle states"
1. INSTALLED
2. SELECTABLE
3. LOCKED

AFAIK, after INSTALL[for install] has been done, application state will be changed to "SELECTABLE" state.
So MY question is when application is in "INSTALLED" state?

INSTALL[ for install] is different to INSTALL[ for make selectable] or INSTALL for INSTALL and MAKE SELECTABLE. Installed does not mean selectable but selectable does mean installed.

Just in my opinion, after INSTALL [for install] succeed, application was changed to INSTALLED state. And then you can use SELECT command to change its state to SELECTABLE.