Im currently working in a construction company at the purchasing department, we usually find a competitive supplier in a low price and got the standard of the products that we need to the project. We usually do to find/search branded items in a multiple supplier here in manila. We usually check the item by product presentation that we set up so they can tell us more with there products is. After that i encoding it in my file. So if i need the item its easy to find.
I do always go to the site to make sure that al my materials is on deliver on time and its the same what i purchase.