On the very large programs I'm typically involved in, it's unusual to have a perfect resource pool like you describe. It's MORE likely that the whole thing is s

On the very large programs I'm typically involved in, it's unusual to have a perfect resource pool like you describe. It's MORE likely that the whole thing is scheduled with job codes, and the labor pool is treated as elastic with additional people brought on as needed to fill roles as Electrical Engineer II or whatever. Generally speaking, you can schedule just fine with partial resources as long as your project doesn't need more of a given resource at any given time than can be allocated to it. Really big construction projects and really big government (defense) contracts work like this.