Practical Solutions for Multiple Accounting Systems

It is very common to encounter multiple accounting systems within
a company umbrella, because of acquisitions or other historical reasons.
Performing spend analysis for such a business requires that the
spending from each of the accounting systems be brought together
in a useful way.

The methodology for bringing together feeds from disparate systems
is straightforward, and with BIQ, simple. It consists of three steps:
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The basic challenge
with multiple accounting systems is to create uniform
Vendor, GL, and Cost Center dimensions.
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1) Normalize transactions to a standard format.
2) Combine dimensions together.
3) Derive useful new dimensions.
Step 1: Normalize transactions

BIQ provides easy-to-use translation tools to normalize the format
of transactions from two or more different accounting systems. These tools can
add columns of data as functions of other columns; permute the order of columns;
and create empty columns as "fillers" when one system can't provide
data, but another can. We also use these
tools to add a new column to the transaction,
namely the SystemID (for example, "SystemA" and "SystemB").

The first step is to define a common transaction format by inspecting sample feeds from
the candidate systems. This format should provide for maximum detail where it
exists, but it must also allow for the inclusion of non-specific data from less capable
systems.

A/P transactions from all systems generally include a notion of Vendor, GL,
Cost Center, and date; they may also include Geography,
Business Unit, and other ancillary information. Typically
the basic transactions contain codes for Vendor and GL, with
separate indexes of Vendor names or GL names.
When there are separate such indexes, those too must be normalized
into a common format. For example, if SystemA has the Vendor name
built into the transaction, but SystemB provides it as a
separate index, BIQ's translation tools can be used to
derive a compatible
index out of the transaction file from SystemA, so that both system feeds
are normalized.
Step 2: Combine dimensions together

There are three fundamental dimensions to any spending cube:
Vendor (aka "Supplier"), GL (General Ledger code/description),
and Cost Center. From these, one can build a Commodity dimension
using rules, and from there one can derive Contract and other
interesting meta-dimensions with more rules. So the first task
in the multiple accounting system scenario is to create uniform
Vendor, GL, and Cost Center dimensions.
Vendor

Let's start with Vendor, which is easiest. Note that there
isn't any fundamental difference between Vendors in SystemA
versus Vendors in SystemB. If there is an entry for IBM in
SystemA, and there is an entry for IBM in SystemB, it's likely
that the only difference between the entries in the two systems
is the way we spelled "IBM." So, we combine both Vendor lists
into one list (BIQ will combine them for us), and family like
Vendors together, just as we would do with a single accounting
system (see
Supplier Familying: Behind the Hype).
General Ledger (GL)

Next, let's consider GL. The first problem with consolidating
two GL systems together is that a GL code may appear both in
SystemA and in SystemB, but that code may mean very different
things in the two systems. So, the first objective is to make
sure that all GL codes are unique. We do that by prepending
the GL codes with the system ID, for example:

SystemA-code23
SystemB-code23

As we mentioned above, BIQ provides translation tools to make such operations easy.

Once the GL codes are loaded into BIQ, they can be familied
together using the same tools that we used to family Vendors.
The idea is to family GLs into an "super-GL" structure, such
that the new structure can accomodate data from both accounting systems.
When detail is missing from one GL structure, but present in
another, the hierarchy is built to accommodate this. For
example, given these codes:
SystemA-code37,"Commercial Print"
SystemB-code123,"Lettershop"
SystemB-code456,"Envelopes"
SystemB-code789,"Print"

a useful hierarchy might be:
Print
General
SystemA-code37, "Commercial Print"
SystemB-code789,"Print"
Lettershop
SystemB-code123,"Lettershop"
Envelopes
SystemB-code456,"Envelopes"

Note that the extra detail from SystemB is represented, but
the non-specific SystemA Print spend (and non-specific SystemB
Print spend) is captured in a "General" category.

If a hierarchy is already present in one or more of the
GL files, we use BIQ's tools to normalize the hierarchy formats
and import them.
The BIQ Dimension Editor can then be used to modify them as
necessary with simple drag-drop operations.
Cost Center

The treatment of Cost Center varies, because often the Cost
Center is held outside any accounting system (since it must
span all of them). The key is to ensure that the "super
Cost Center" dimension is built similarly to the GL dimension above
i.e., there is a place in the hierarchy for all of the elements of each system.
Step 3: Derive useful new dimensions

Finally, by deriving a dimension on the SystemID
(added to the transaction files in Step 1, above), one can:
- See a combined view of the systems
- See a view containing only one system
- See a view containing some of the systems, and not others (if there are more than two)
The completed system provides the best of both worlds an integrated view
across all or any subset of the systems, as well as an individual system-by-system view, all
accessible by filtering on the SystemID dimension.