Why is it important to specify the interfaces of components that are being developed by a software engineering team?

Why is it important to specify the interfaces of components that are being developed by a software engineering team?
Answer: An important part of any design process is the specification of the interfaces between the components in the design. You need to specify interfaces so that objects and subsystems can be designed in parallel. Once an interface has been specified, the developers of other objects may assume that interface will be implemented. Interface design is concerned with specifying the detail of the interface to an object or to a group of objects.