Typical causes of failure are as follows:
Developing the wrong product or service—inadequate product or service for market requirements, or the product or service is overtaken by technology or competitor products.
Inadequate planning and control—cost overruns, poorly designed or incorrectly designed products or services, and overpriced products or services.
Schedule delays—missed window of opportunity because of poor timing.
Performance issues—the final product or service developed does not meet customer requirements or expectations.