thank you....it would be a huge amount of extra work and record keeping to achieve nothing
In my first post I told you that "you have to roll up your sleeves and go to work", and "you will do better to be flexible along the way". Again I mentioned that "the best plans , do not make up for smart selection". No matter your plan, it boils down to good selection. You can have the best plan, and pick the worst birds. You can have an inferior plan, and pick the best birds. It is not the plan. It is the selection.
You laid a partial plan. I do not like it, but I saw nothing that would hurt you . . .IF you select the right birds. You would have figured the rest out along the way. "you will do better to be flexible along the way".
For example, you would have learned that your best laying pullets will generally be the best laying hens. You would have adjusted by evaluating a female through her pullet year, which ends at her first molt. She would be roughly a year and a half old. It would probably be advisable to breed your best birds in the late winter or early spring of the 2nd year. The cockerels in their first year, proving them over hens, and judging them by their offspring. They should be retained until their offspring is evaluated. The cock is half of the influence, so it would not be advisable to neglect the influence the male has even in an egg laying flock. You would pick offspring from the best hens, but genetic variability will teach you that all of her sons will not contribute consistently.
Can this get too complicated for a small flock? Yes. That is why you have to come up with "your own plan, and your own rhythm". Adjusting along the way. It isn't the plan as much as it is smart selection.
Egg size is easy to select for. Average the size of your eggs. Decide what your minimum would be. You have to set eggs, so your initial standard cannot be too high. From there do not set eggs below a certain size. As the average improves, raise the bar. "Little by little, bit by bit".
I told you more than you think I did. You did not get what you wanted, but you really did get what you needed. Start with your own plan, and as you learn, you will adjust. A religious adherence to a plan will not make you a good breeder. BUT, as time goes on, you will develop your own rhythm. It really becomes a rhythm of sorts. Your own plan, your own rhythm.
The suggestion to review the "ALBC guidelines" (Which is not their own. It is very basic culling guidelines passed down along the way.) is a good starting place. If you are not blindly and religiously adherent to this "plan", you will learn that there is more to it than that. You would not want to quit learning would you?
If you read this, and then go back and read my last response, you may start to see the connection.
I agree that striving for extreme performance on both sides (meat and eggs) would be a lesson in futility. I do not agree that there cannot be good performance on both sides. I would say that there should be good performance on each side, or it is not a dual purpose bird. A strain that lays 200 extra large eggs, and produces fryers @ 12-14wks is a darn good strain. This strain could pay their own way, and is worth something. This imaginary dual purpose flock would be more economical to raise than two, in a homestead type setting. Thus the reason for all of the dual purpose breeds. Commercialization requires specialization. A homestead or backyard would be better served by a dual purpose bird, where both (eggs and meat) were given equal priority, and the cost of such was a concern.