In a method of forming a thin layer having a desired composition, a source gas is provided onto a substrate loaded in a chamber for a first time, and the source gas is chemisorbed onto the substrate. For example, the systems described herein may allocate a percentage of inventory to a custom inventory location that is physically near custom container forming devices, thereby reducing the cost to pick, sort, pack and route items for shipment, storing or otherwise handling in a custom container. 5%:ZrO2+Hf2O: >85%SiO2: 1% to 12%Al2O3: 0. The sensor-based location is checked based on a comparison of the images. A method of sensitizing an animal as well as a method and system for screening chemical compounds is also disclosed.