Is it permissible for a company to accept the manufacturing of a product with specific requirements that it is unaware of, under the pretext that technicians will study these requirements later? And is this considered to be a sale of gharar (excessive uncertainty)?

A contract for the manufacturing of a product is an Istisna' (manufacturing) contract, which combines elements of Ijarah (leasing/hiring), Salam (forward sale), and Bay' (sale). The most important condition for the validity of this contract is to clearly specify the genus, type, quantity, and characteristics of the manufactured item in a way that prevents disputes. It is not a condition that the manufacturer be able to produce the item immediately; rather, it is sufficient that they know they will be able to do so before the deadline. A company may enter into such a contract if it has technicians capable of fulfilling the requirements, and it can also enter into a parallel Istisna' contract with another company.