masse24, on 2016-July-11, 10:01, said:
Assuming a 15-17 No-Trump:
...is one way of doing it. Here's another:-
1NT - 2♣ - 2♥ - 3♥ clearly INV and a 4-4 ♥ fit
1NT - 2♣ - 2♠ - 3♠ clearly INV and a 4-4 ♠ fit
1NT - 2♣ - 2♥ - 2NT clearly INV and 4 spades (remember, opener could have both hearts and spades...)
1NT - 2♣ - 2♥ - 2♠ INV and no 4-card major or slammy with clubs(Alert!)
1NT - 2♣ - 2♠ - 2NT clearly INV and may not have a 4-card major (Alert!)
1NT - 2♣ - 2♦ - 2♠ INV and may not have a 4-card major or slammy with clubs (Alert!)
There are many other possibilities too, all with different advantages and disadvantages.