I'll try to put in my scattered, underinformed ideas marauding as some sort of unified opinion based in fact

.
It's been a while since I brushed up on the great war, so forgive me if I botch a few facts.
To say that Austria was fully informed on the risks of the war is a bit of a folly; keep in mind that Conrad did not have the kind of details on the Schleiffen plan and had been ensured that the Germans would be there to crush the Russians in Galicia, Silesia, and Prussia. The two main conspirators of the war which I view are Berchtold and Conrad individually, for what one did not know fully about the issue the other had twisted and delivered to the emperor to add for causus belli.
The Austrian military plan (again, forgive me if this is too sketchy) was a fairly simple design, and was relatively intelligent at that, but poorly implemented. Conrad had set up the A Staffel, B ('swing') Staffel, and C staffel. The A Staffel located in Galicia and the C Staffel located just North of Belgrade. The A and B Staffel were approximately the same size, while the C Staffel was somewhat larger. All documents say officially that the German general staff had intentionally kept the Austrians in the dark, knowing that the Habsburgs, as it has been stated, were more interested in self-preservation than anything else.
When it finally came down to war, Conrad had recieved more assurance from the Germans (through Berchtold) that they would be there, and appropriately assigned the B Staffel to move with the C Staffel into Serbia, as opposed to North where they really should have been. As has been evidenced in this war, timetables would doom many careless generals--by the time word came in that the Germans were pouring into France, the B Staffel was already heading South, and new railroad timetables could not be drawn up in the given time to go North with the A Staffel. Instead, about three-fifths of the Austrian army was poised against Bulgaria, while a comparatively feeble number of soldiers stood to defend Galicia.
By the time the Russians came crashing down, an all too inadequate piece of the Austrian army's fate was sealed, and by the time the trains could be turned around to Galicia everything was snowballing so quickly that the casualties would become enormous.
Because Berchtold had pushed for war by misinforming both the Emperor (as when he said shells had been fired from Belgrade), and the main General, Austria miscalculated entirely in the risks involved in the undertaking and, not only that, but had completely blown off where to place their forces.
Austria marched blindly, albeit with purpose, towards war.