Can China build two carriers at once? Do they need to?
The answer to both is yes, but will they?
Ok 2016 just got really really interesting !!!
001A and 002 are built by two different shipyards, and by two different teams (DL & JNCX). There is no conflict for resources. The planning for 002 and 001A were about at the same time, according to Chinese sources, which makes sense to me. The steam catapult is ready and no other technology barriers stand in the way of building 002.
In all likelihood, the construction of 001A and 002 are three years apart. So 002 may start to be built next year and will be commissioned by 2022.
Building a carrier takes a long time. For each of the classes 001, 002 and 003, it'll take roughly ten years from planning, design, hull-construction, launch, fitting, sea trial to commission. China will not build them in strict sequential order and their build schedule will be staggered.
It is because of this long build cycles that I believe they will have a secondary build branch 001A, 002A, and 003A that will be of the same corresponding class of the primary build branch 001-> 002 -> 003, but will incorporate incremental learning and technology developments from the construction/operations of previous carriers. This secondary build branch will also speed up the formation of China's carrier forces and leverage the economy of scales in construction and training. Ten years is a long time; already we're seeing a lot of people second-guessing the decision to build 001A instead of go straight to 002. And that decision were made around 2011-2012 when China was less confident about its carrier-building skills and steam catapult were mature enough.