We will calculate the number of vials that can be put into a lyophilization tray.
Step 1: Identify the length and width of the tray available for fill. Remember to subtract out any tray ring dimensions or spacers that manufacturing may be using when pushing vials into the tray.
Step 2: Identify the outer diameter of a vial.
In any rectangular tray filled with round vials, there are two kinds of rows. We will call them "corner" rows and "stagger" rows.