I do believe this could be shown as the simple model for stopping an attack. It is very rigid though in my opinion, and if the enemy should get through you´re truly f*?#¤d because once the troops realize the enemy might be through they start running, and at least in the pics there are no reserves to counter the breakthrough area. Usually the enemy is trying a breakthrough with 3-5x overpower locally, and the Soviets preferred minimum 5x so fast moving reserves are necessary because the Soviets expected a huge force trying to get through.
Actually I always thought Zhukov liked to attack not defend...?!!
In front of Moscow-he attacked.
In Rzhev - he attacked
In Stalingrad- he attacked
After Kursk- he always attacked
That was also the idea that the Red Army had for years preached- take the war to your enemy´s ground, not your own.