Unearthing the ‘Why’: Root Cause Analysis in Process Mining

In the relentless pursuit of operational excellence, businesses often find themselves staring at symptoms—the digital equivalent of a persistent, nagging cough. Long wait times, crippling lead times, or unexpected bottlenecks are just the superficial signs of deeper systemic issues. To move beyond mere symptom treatment, organizations need a diagnostic tool sharp enough to pinpoint the very genesis of these ailments. This is where Root Cause Analysis (RCA), powered by Process Mining, shines, transforming a vague problem into a clear, actionable directive.

For many, data analysis is the equivalent of an astronomer studying the night sky.

They meticulously catalog the visible stars, map their positions, and observe their movements.1 This provides a detailed description of the universe. Process mining with RCA, however, is like an archaeologist . It doesn’t just describe the visible workflow; it digs beneath the surface of the event logs, layer by digital layer, to unearth the hidden, long-forgotten structural flaws, decisions, or dependencies that are truly dictating the process’s current, flawed state. It shifts the focus from what is happening to why it’s happening.

The Diagnostic Powerhouse: Linking Deviations to Steps

Process mining takes event data—the digital breadcrumbs left by every action in an IT system—and reconstructs the actual, as-is process flow.2 The RCA layer then focuses on key performance indicators (KPIs), such as throughput time, compliance rates, or, critically, performance deviations like abnormally long wait times. By segmenting and comparing the paths of ‘good’ cases (fast, compliant) against ‘bad’ cases (slow, deviating), the RCA algorithm statistically isolates the process steps or attributes that correlate most strongly with the poor outcome.

For instance, if customer onboarding time suddenly surges, RCA might compare the 5% slowest cases to the 5% fastest. It could reveal that the slow cases disproportionately passed through an optional manual review step in the ‘Approval’ stage, or were handled by a specific, overloaded team queue. The deviation (long wait time) is thus linked back to the specific process step (optional manual review) and its execution context (queue allocation).

Case Study 1: The Insurance Claim Conundrum

A major European insurance provider was plagued by a high rate of claims exceeding their mandated 10-day settlement window, leading to significant penalties and customer dissatisfaction. Initial analysis pointed vaguely to ‘Underwriting.’ Using process mining and RCA, they analyzed hundreds of thousands of claims. The RCA revealed that 92% of the delayed claims involved a specific step: ‘Request for External Medical Report (REMR).’ Furthermore, it showed that the delay wasn’t in waiting for the report, but in the 48-hour internal wait time after the report’s digital receipt, before an underwriter opened it. This uncovered a critical hand-off flaw: the system flagged the report as ‘received,’ but didn’t automatically change the underwriter’s queue priority, allowing the claim to languish. By simply automating the priority change and adding a notification trigger, the median settlement time dropped by three days. For those looking to master such practical applications, exploring data analytics courses in Hyderabad can be a great first step.

Case Study 2: Supply Chain’s Costly Detours

A global electronics manufacturer noticed their ‘Procure-to-Pay’ (P2P) cycle costs ballooning, despite optimized sourcing agreements. They suspected maverick buying. The RCA analysis focused on the KPI of ‘Purchase Order (PO) variance from approved price.’ The tool tracked POs from creation to payment, correlating the high-variance cases. The culprit wasn’t maverick buying by new employees, as initially thought, but a particular ‘Change Request’ process step. Specifically, when a supplier initiated a minor price adjustment, the digital workflow routed the PO through a high-friction, email-based re-approval loop involving senior management, which took weeks to resolve, often missing early payment discounts and incurring rush fees to mitigate the delay. The actual cause was a poorly designed digital re-approval gateway.

Case Study 3: Healthcare’s Critical Throughput Barrier

A hospital wanted to reduce patient throughput time from admission to discharge, a crucial factor for efficiency and patient care. The most significant deviation was identified in the ‘Discharge Planning’ phase. RCA compared quick-discharge paths with slow-discharge paths. The key difference was not the doctors or the nurses, but the ‘Medication Reconciliation’ step. Specifically, in slow cases, the step was performed by an on-duty pharmacist after the discharge order was finalized, leading to a long wait for the specialist’s availability. In fast cases, a clinical technician performed an initial reconciliation concurrently with the doctor’s final rounds. The RCA demonstrated the critical timing dependency: shifting the step from serial to concurrent execution streamlined the final leg of the patient’s journey, saving precious hours and freeing up beds faster. Building skills in this domain, perhaps through data analytics courses in Hyderabad, is vital for future process experts.

RCA: The Compass Guiding Process Transformation

RCA in process mining transforms operational data from a passive report into an active instrument of change. It moves beyond identifying where the process broke (e.g., “The wait time is long at step X”) to definitively proving why it broke (“The wait time is long at step X because 85% of cases are routed to the specific team Y, which is statistically under-resourced”). This level of causal certainty is the fuel for intelligent automation, targeted training, and efficient process redesign. For any organization serious about continuous improvement, mastering the link between process deviation and its root cause is non-negotiable. It’s the difference between treating a cough and curing the disease, a skill increasingly valued in the job market, making data analytics courses in Hyderabad a smart investment for career growth.

Conclusion

Process Mining with integrated RCA offers a profound shift in how operational problems are solved. By systematically stripping away superficial symptoms to expose the underlying workflow, data, or resource bottlenecks, it provides the undeniable evidence needed to drive high-impact, low-risk process changes. It is the definitive ‘why’ that underpins every successful ‘what next.’