The following is a theory that is open for discussion, and I feel this forum has the most potential for understanding it and providing constructive criticism, so if it seems like I'm stating things as absolute fact, I'm only doing so out of theoretical formality and don't necessarily believe it to be completely true or think it's complete. That said:

Stages of Development

Imagine a child that grows into an adult. After that child is born into the world and starts growing with it, there will be aspects to their existence that evolve with how their mind comes to understand their relationship with the world's nature.

1. Childhood Innocence and the Process of its Destruction (Psychological Regression) - As the child begins to experience the world, they will be prone to taking first-hand experiences and instincts as absolute truths, simply because they have no reason to understand otherwise. In this stage if such absolute truths are called into question or challenged and shown to be maladjusted beliefs, a process of defensive neurosis and heavy projection inevitably results before the child is forced to question what they have come to believe. In terms of function dualities, it could probably be said that in this stage there is no desire to separate opposing aspects of cognition (evidenced by neurosis and projection). The inevitable regression that is produced leads to questioning of them-self and a desire for psychological stability that proceeds into the next stage of Ego Differentiation.

2. Ego Differentiation (Psychological Repression) - Here is where the child starts to separate and differentiate them-self from what created Psychological Regression and becomes an adult. In order to do this, parts of the self must be encouraged and utilized more intensively, while other parts then must inevitably be repressed to do so. In this stage we get a formation of ego that provides a mental clarity and stability to an otherwise chaotic, neurotic, and projective existence of conflicting functional aspects. And in this stage, we have a greater awareness for the harmful results of being without an ego by again aiming at repressing parts of ourselves. But as the ego stabilizes and a mastery of the will is obtained from it, this leads into the next stage of development of individuation.

3. Individuation (Ego Release) - In this stage, the repressed parts of the ego can come out in a positive manner, and in a manner that the ego has some stabilizing control over. This is where the adult becomes a mature adult. The ego then comes into a process of dissolution in order that avoided aspects of existence can be appreciated, a greater awareness is achieved, and the full intelligence of the Self that each person has can be realized independent of any concept or expectations of thought and behavior or any external standards endowed.

Application to Model A

In terms of the functions of Model A, I think this can be applied as well.
1. Stage one pinpoints areas of the superid by showing them in a negative light.
2. Stage two highlights properties of the ego, while showing the superid as neutrally aligned, but something that is grown and learned upon. And the superego here is a negative expression of the conflict that goes into superid suppression.
3. Stage three removes the conflict between ego and superid, allowing the superego to become positive and creating a self-actualized or individuated characterization of the person.