An organisation may hold one real-time Service Agreement. That single agreement carries one Volume Band and one Service Package, so it is not possible to hold two agreements at a lower Volume Band and add the volumes together.
Two different things
Basic,Bronze,SilverandGoldareService Packages- they determine the delivery services you receive. Volume Bands 1 to 7arevolume tiers- they determine the charge for the amount of data you receive. Your annual fee is the sum of the two. A "Basic, Volume Band 3" agreement is a Basic Service Package priced at Volume Band 3.
Several orders, one agreement
Orders are not priced or banded separately: they are combined and added together under your single real-time Service Agreement, and the combined total determines the one Volume Band that applies.
This means submitting two orders that each fall within Volume Band 3 does not give you two Volume Band 3 allowances. Their volumes are added together, and if the combined total exceeds the upper limit of Volume Band 3, the agreement moves to Volume Band 4.
A Volume Band is a daily average, not an allowance you draw down
The Volume Band is based on theaverage volume per day(GiB per day) produced by your data requirements, measured before any compression.
Volume Band 3 means you receive an average of between 10 to 100 GiBper dayfor the duration of the Service Agreement. It is not a total pot of 10 to 100 GB to be consumed over the contract year.
All the data in a single agreement is added together, and that total determines which one band applies.