Answer:
The development phase
Step-by-step explanation:
Every product goes through different phases till is manufactured and available for sale. Among these phases are identification phase, concept generation phase, development phase, launch phase, etc.
All of these phases have specific process that happen within them but for the purpose of this question, let's stick to the development phase.
The development phase of a product is the phase in which the product is designed and manufactured. The development starts with the manufacturing of a prototype and then it is tested for performance, etc The testing could be in the market or in a created environment, etc.
The results of this test is then put into consideration and its effect is taken into account. This helps to determine if the product should be redesigned or should have some parts of it removed or added, etc and ultimately decide whether to start full scale production of the product.
I hope this helps.