After laying the groundwork — Time data as a governance lever, capacity management, skill coverage — one question arises almost naturally: what does the reliability of this Time data we seek to leverage actually rest upon?
The answer is less obvious than it seems. And often underestimated.
Episode 4 of our Time Activity Management series.
The myth of autonomous Time Activity Management
We would like to believe that Time Activity Management can, on its own, provide a reliable reading of activity. That it constitutes an autonomous system, capable of faithfully reflecting operational reality.
But this vision is misleading.
A Time Activity Management system only captures, structures, and reports pre-existing information. It guarantees neither consistency nor quality. It acts as a revealer. And sometimes, as an amplifier of inconsistencies.
As soon as you operate across multiple entities, multiple countries, or simply within complex organizations, the lack of harmonized master data becomes immediately apparent. Comparisons lose relevance, consolidations become questionable, and the resulting decisions are weakened.
It is not a tool problem. It is a foundational problem.
The silent challenge of master data
Behind every indicator, there is a language. And this language is carried by master data: organization, jobs, positions, reporting lines.
When they are not aligned, each entity actually continues to tell its own story. The same role can cover different realities. A structure can be defined according to divergent logics. Similarly, misunderstood data can cover fundamentally different realities for an entity or stakeholders with opposing needs. Thus, what is consolidated at the group level becomes partial, difficult to compare, and sometimes contested.
The time spent reprocessing, reconciling, and explaining becomes considerable. And above all, trust erodes.
Because ultimately, an indicator that must be constantly justified or corrected ceases to be a management tool. It becomes a subject of debate.
When organizations become fluid
This subject takes on an even more critical dimension as organizational models evolve.
Mobility is accelerating. Structures are becoming matrix-based. Work is increasingly organized in project mode. Internal gig economy logic is developing.
In this context, the notion of assignment is no longer binary. It becomes partial, evolving, and sometimes temporary.
However, if these realities are not formalized, tracked historically, and integrated into master data, they simply disappear from the radar. A resource allocated 30% to a cross-functional project may never appear as such. Hours will be charged elsewhere, costs consolidated approximately, and actual capacity will remain poorly assessed.
Here again, Time Activity Management only reflects what it is shown. If the upstream information is incomplete or imprecise, the resulting management can only be the same.
The real issue: trust
This discrepancy is reflected today in the expectations of executive management. The demand for HR indicators has never been higher. Yet, confidence in this same data remains surprisingly low.
This paradox is telling. It does not reflect a lack of data, but a deficit of credibility.
When dashboards are systematically questioned, multiplied, and decorrelated from business needs, decisions slow down. Meetings focus on the validity of figures rather than on actions to be taken. Teams spend more time explaining than managing.
Conversely, when data governance is in place, when Core HR fully plays its role as a structuring foundation, a shift occurs. Data is no longer contested. It becomes a shared point of reference. Time Activity Management then becomes part of a broader ecosystem, serving cross-functional management that finally links HR, financial, and operational challenges.
Performance does not begin with a more sophisticated tool. It begins when the data is no longer debated.
Rethinking Core HR as a governance lever
Reducing Core HR to a technical infrastructure is undoubtedly one of the most frequent mistakes.
In reality, it does not just structure systems. It structures the way the organization describes, understands, and manages itself. It determines the quality of trade-offs, the speed of decision-making, and the ability to align different functions around a single interpretation.
In an environment where organizational complexity continues to grow, it becomes a governance lever in its own right.
Ultimately, the question is not whether we have data.
Most organizations already have a lot. Sometimes too much.
The real question lies elsewhere: what do they actually rest upon?
Because between available data and reliable data, the gap is immense.
And it is precisely in this gap that the quality of decisions is determined.
Written by
Clémence Levinson
HR Transformation Director and Data HR Core HR Offer Leader
Florian Dugrenil
HR Transformation Time Activity Management Offer Leader
