Even companies that have renowned and robust front-end processes noted some of these problems. Ask yourself whether your company shares any of these complaints.
Vocal champions cause poor programs to survive too long.
Managing programs of varying sizes and complexity with the same basic process is difficult. The best and most important programs don't get funded with the highest priority. Companies receive insufficient market information early in the process. Clear decision criteria for accepting or rejecting ideas at the earliest stage do not exist. Not enough new ideas are being generated.