Order Promising Strategy

Taking the given scenario forward, consider that Nosy has already launched its smartphone Best $1,$ and the product has successfully completed six months in the smartphone market.

Six months is quite a long time in the smartphone industry. Nosy knows this and wants to bring a slightly improved version of Best $1$ by tweaking certain specifications without bringing any major change in the production of the smartphone. Nosy will be launching this improved version by the name of Best $1$S$.$

The primary focus of the company will shift from Best $1$ to Best $1$S$.$ Nosy wants its customers to buy Best $1$S rather than Best $1$ and, therefore, decides to phase out Best $1$ in the coming month. During the phase$-$out, the company does not want to make a loss in fulfilling any customer order for Best $1.$

Which is the most optimal order promising strategy that Nosy should adopt in the phase$-$out of Best $1?$

Profitable$-$to$-$promise $($PTP$)$

Capable$-$to$-$promise $($CTP$)$

Available$-$to$-$promise $($ATP$)$

Any promising strategy will work, as the brand is new to the market