Value Stream Owner

Have you seen value stream maps that expose big queues and huge ineffectiveness in software development organisations? I have but seldom I see something done that would improve the situation. There are many reason why so little is done but I feel that most important one is lack of value stream owner. Value stream owners main responsibility is to create effective and profitable value stream but many product development organisations have not recognised the need for such a person.

In Toyota where the value stream mapping is said to becoming from there is owner for product development value stream called chief engineer and therefore the value stream mapping in Toyota improves the situation. So do not copy the value stream mapping without value stream owner because it does not work in my experience.