What are the different types of safety factors used in the pharmaceutical industries?

Following safety factors are used in pharmaceutical manufacturing.

•  1/10 to 1/100th of a normal daily dose = Topical products

•  1/100 to 1/1000th of a normal daily dose =     Oral products

• 1/1000 to 1/10000th of a normal daily dose = Injectable & Ophthalmic products

• 1/10000 to 1/100000th of a normal daily dose = Research, investigational products.