Consider the following vendor classification based on their overall performance scores:

Developmental $($less than $70)-$ supplier is required to take corrective action if it is rated at this level for three consecutive months during the cale Acceptable $($between $70$ and ${89}^{**})-$ supplier is required to provide a plan to Federal$-$Mogul on how to achieve preferred status.

Preferred $($between $90$ and $100)-$ supplier to be worked with on new product development, approve for new business, and assist in maintaining a $*$The upper boundary is not included.