Maybe one the ADC guys can comment, but I assume the BRX AC vs DC stocking plan was driven by studying existing DL06/DL205 AC/DC volume. For whatever reason, there has been far more interest in the DC units than expected. We're having to scramble a bit, but we should have everything back in stock within a couple of weeks. Just growing pains.
I am not sure what method my compatriot used to determine stocking levels, but I know he did a lot of analysis before coming up with the BRX stocking numbers. He ran the numbers by me (I am the Do-more Product Engineer) and a few other folks and then adjusted them upwards once again and we still have managed to stock out of some parts.
I don't envy him his job. It is a lot more art than science. Trust me when I say ADC hates to run out of stock on anything. We pride ourselves in having what you need in stock and getting it to you on time. But, it happens. We can't foresee a customer coming in and ordering thousands of something off of the website with no notice. (Yes, that actually happens as crazy as that may seem.) We try very hard to forecast and make sure that we have safety stock, but sometimes demand is unpredictable.