The single source of truth: A CFO challenge

17-07-26
- Blog

This post is also available in: NL

“We need a single source of truth” is a phrase that appears frequently on the CFO agenda.

But what exactly is a single source of truth (SSOT) in finance? It is often understood as having one central system or database containing the company’s results, numbers and positions. Everyone retrieves information from the same primary source, reports are aligned, collaboration improves and management can make better-informed decisions.

Who wouldn’t want that?

Yet while everyone is using the same source to interpret numbers and produce output, what about the data that is submitted, uploaded and/or interfaced to this single source of truth?

Is the same transaction treated consistently from one period to the next?

Costs may be recognised immediately in one period but accrued for in another, even though the underlying circumstances are comparable.

Do reporting units apply the same principles to comparable transactions?

Proceeds may be reported as revenue by Unit A but used to offset costs by Unit B.

Do departments interpret definitions and KPIs consistently?

One department may report FTE including temporary staff, while another excludes them.

Is everyone using the same current policies and instructions?

One employee may use an outdated policy stored on a shared drive, while another follows a recently issued instruction received by email.

In plain English: you may retrieve your information from one source but garbage in is still garbage out.

A true single source of truth therefore requires three foundations:

Uniform definitions, guidelines, policies and ownership.
A single, accessible source of knowledge that enables people to apply them consistently.
A reliable and controlled system for submitting, consolidating, reporting and analysing data.

The distinction is important:

A single source of data determines where financial and operational information is submitted and reported.
A single source of knowledge determines where definitions, policies, instructions and examples are maintained.
A single understanding of truth is created when the two work together.

Let’s explore the first two foundations in more detail.

WHY CONSISTENT DEFINITIONS MATTER FOR AN SSOT

Consistency starts by determining what each number means, how transactions should be processed and how positions should be reported.

When numbers are not defined and prepared consistently, comparisons become difficult. Management may draw the wrong conclusions when comparing entities, periods, products or performance indicators.

Policies and definitions must therefore be sufficiently clear to produce consistent outcomes when applied to comparable circumstances. They should include business-specific examples and establish:

the relevant scope;
recognition and measurement criteria;
cut-off rules;
calculation methods; and
the treatment of exceptions.

Ownership is equally important. Every key definition and policy in the SSOT should have:

a named owner;
an approval authority;
an effective date;
version control;
a defined review cycle; and
a process for resolving questions and documenting exceptions.

Someone must be accountable for maintaining the guidance and deciding how new or unusual situations should be treated.

However, uniformity does not mean that every transaction must receive the same accounting treatment. Different facts may justify different outcomes. The objective is that comparable circumstances are assessed using the same principles, and that any resulting differences can be explained.

WHY A SINGLE SOURCE OF KNOWLEDGE IS THE MISSING LINK

Even a well-designed policy has limited value if employees cannot find, understand or apply it.

In many organisations, guidance is distributed across accounting manuals, reporting instructions, emails, presentations, shared drives and the knowledge of individual employees. As a result, people may work with outdated documents, follow instructions that have been superseded or rely on how a transaction was handled in the past.

A single source of knowledge should provide current:

policies and definitions;
practical processing and booking instructions;
business-specific examples;
answers to frequently asked questions; and
guidance on exceptions and judgement calls.

It should also make clear which version is current, who owns the guidance, when it was last updated, where questions can be raised and how exceptions should be documented.

The objective is not simply to store information in one place. It is to make the correct treatment easy to find, understand and apply. This requires a central, up-to-date knowledge platform that connects information and makes relationships and interdependencies visible.

For example:

An accounting policy is linked to the relevant booking instruction.
An account definition refers back to the policy governing it.
A closing procedure connects to the reporting calendar.
A frequently asked question links to the approved guidance on which the answer is based.

These connections help employees not only find the right information but also understand how it fits together.

A DOCUMENT REPOSITORY STORES INFORMATION. A SINGLE SOURCE OF KNOWLEDGE STRUCTURES AND CONNECTS IT.

HOW TO BUILD A SINGLE SOURCE OF TRUTH

Building a single source of knowledge requires more than uploading documents.

Information must be governed, searchable, connected, version-controlled and translated into practical instructions for the people processing transactions.

Only after a shared understanding has been established and made accessible can technology process and report data consistently.

A single source of data tells people where to find the number. A single source of knowledge helps ensure that the number was prepared correctly and consistently.

In practice, building a single source of truth comes down to five steps:

Map your existing policies, definitions and instructions. Most organisations already have far more of this than they realise.
Assign clear ownership for each policy and definition, including an approval authority and an effective date.
Structure and connect the content, so that policies, accounts, processes and reporting lines reference one another.
Make it searchable and version-controlled, so employees always find the current guidance rather than an outdated copy.
Translate policies into practical, day-to-day instructions that people can actually apply when processing transactions.

HOW FIDUGIUS BUILDS A SINGLE SOURCE OF KNOWLEDGE FOR YOUR TEAM

A single source of knowledge is a foundation for consistent, reliable and scalable reporting and decision-making.

The good news is that most organisations already possess much of the information required to create one. The challenge is not necessarily creating new information from scratch. It is bringing together fragmented knowledge, structuring it, connecting it, governing it and making it accessible.

That is what the Fidugius Financial Accounting Manual is designed to support. It connects policies, definitions, booking instructions, account guidance and reporting procedures in one controlled knowledge environment.

Because a true single source of truth starts with a single understanding of truth.

Interested in seeing how the Fidugius Accounting & Reporting Manual works in practice? Get in touch to request a demonstration.

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What’s the difference between a single source of truth and a single source of data?

A single source of data tells you where a number is stored and reported. A true single source of truth also requires a single source of knowledge, the definitions, policies and instructions that ensure the number was prepared consistently in the first place.

Is a shared system like SharePoint already a single source of truth?

Not on its own. A shared system determines where data is stored and reported, but it doesn’t guarantee that everyone applied the same definitions and policies to get there. Without a connected, governed source of knowledge, a shared system can still contain inconsistent numbers.

Who should own a single source of truth within the organisation?

Ownership works best when it is shared: Group Finance typically owns the overall framework and governance, while each individual policy and definition should have its own named owner responsible for keeping it current.

How can Fidugius create a single source of truth?

The Fidugius Accounting & Reporting Manual brings the two foundations discussed above together in one platform. It connects policies, definitions, booking instructions, account guidance and reporting procedures into a single, cross-referenced knowledge environment, so employees always work from the same, current version. Every policy gets a named owner, an effective date and version control built in, and the platform can be deployed within your own SharePoint environment or as a managed cloud solution. After implementation, key users are trained to maintain and update the content themselves, so it keeps working as a living knowledge base rather than a one-off project.

What’s the difference between a document repository and Fidugius when it comes to a single source of truth?

A document repository, such as a shared drive full of PDFs, stores files, but leaves it up to the reader to find the right version and work out how it relates to other guidance. Fidugius does more than store: it connects. A booking instruction links back to the policy that governs it, an account definition refers back to its policy, and a closing procedure connects to the reporting calendar. That structure, plus a named owner and effective date on every policy, is what turns scattered documentation into an actual single source of truth, rather than just a place to store files.