5S is a lean manufacturing tool designed to lead to a clean and orderly workplace as well as create efficient processes. The 5S's are: sort, set in order, shine, standardize, and sustain. Some companies add “safety” as a sixth. 5S practitioners apply all the S's to workplace layout and manufacturing processes. Integrating environmental management procedures into standard work procedures can further reduce workplace errors, such as spills, lead to fewer product defects, and generate higher productivity due to more efficient placement and use of tools—which, in turn, can lead to more efficient use of materials. For example, using a simple color-coded tagging process during the “Sort” phase (such as with sticky notes) to identify hazardous chemicals can prevent mistakes later in the process and help avoid accidents. Identifying hazardous materials can also help managers keep track of how much is being used in the manufacturing process and find ways to reduce the use of such materials.