CEVAP:

The disadvantages of discovery prototyping are as follows:

• Developers must be educated about prototyping.
• Users may develop unrealistic requirements by considering the performance, reliability and properties of the prototype. Prototypes only imitate the functional-ity of the system, thus naturally it is not complete. Users must be educated about this and misdirections must be prevented.
• Construction of a prototype may lengthen the system development process and may increase the cost of development activities.