I think the idea is rapid maturing (so you can harvest adult organs) and then a variety of specific failures (so you can harvest any type of organ).

I also think it isn't a very likely scenario, engineered organs would probably be enabled by the level of knowledge required to accelerate maturation and death and have the advantage of being faster and cheaper. Doctor's have already figured out how to make simple organs like bladders (that group is close to testing engineered livers in animals http://www.wakehealth.edu/Research/WFIRM/Projects/Human-Live... ).