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25 marquee operators across 21 countries trust VB Engineering with their Discrete Event Simulation engagements.
VB Engineering Discrete Event Simulation from the Hyderabad HQ + 9 site offices. Country-native standards overlay. CEng MIE (India) + FIE signed. Native handover to Wistwin · the sister Industry 4.0 digital twin SaaS.
When the question is "what does this plant do under conditions A versus conditions B," discrete-event simulation gives a defensible answer. We build the models, run the experiments, and deliver evidence-grade analysis the India operator can act on.
Across the 21 refineries, 35 GW of thermal capacity, and 600+ industrial estates that anchor India's manufacturing base, a validated discrete-event simulation is what turns a capex proposal from an argument into evidence. India runs one of the most concentrated brownfield retrofit markets in the world: 21 refineries operating between 1965 and 2018 vintages, 35 GW of thermal capacity overdue for arc flash recertification, and a pharma cluster (Hyderabad, Visakhapatnam, Ahmedabad) where every API plant carries IS 5571 hazardous-area exposure. India's greenfield era is largely past for refineries and metals. The next decade of value comes from brownfield expansion, debottlenecking, and digital-twin handover on plants that are 15-40 years old. That is where every one of our last 1,000+ studies has happened.
Process is captured to BPMN 2.0 and ISA-95 conventions. Input data validated to ASTM E2476 / VV&A practice. Output statistics confidence-bounded; no single-run results in the deliverable. Where the operator references IS 3043 (earthing) · IS 5571 (hazardous area classification) · IS/IEC 60909 (short-circuit) · IS 13947 (LV switchgear), the engineering reference layer aligns; the simulation methodology is invariant.
Process flow captured on the live plant, walked with operations, modelled in FlexSim / AnyLogic / Simio. As-Is model validated against 4-6 weeks of historian data so the baseline matches reality before any what-if begins.
Steady-state throughput under base-case conditions, with bottleneck identification at the resource level. Where the bottleneck is constraint-stacked (two resources alternating as the constraint), the model surfaces this with utilisation curves rather than averages.
Capex options modelled side-by-side (debottleneck option A versus capacity-expansion option B versus operational-change option C). Each scenario reports throughput, utilisation, queue length, and Service Level confidence with bounds.
Random-failure modelling of the critical equipment fleet with MTBF / MTTR from the operator CMMS. Plant performance under cascading failure scenarios. The deliverable answers "how resilient is this plant" with a defensible number.
Where input data has measurement uncertainty (a recurring reality in India brownfield plants), the deliverable includes sensitivity sweeps on the top input drivers so the operator sees which assumptions move the answer the most.
The FlexSim / AnyLogic / Simio model handed over with a run-book the operator's engineering team can use to run their own experiments. Where the operator subscribes to the Wistwin platform, the model integrates with the digital-twin layer directly.
Three engagements that show how this works in practice across Indian brownfield plants:
a 220,000 BPD coastal refinery with 1996-vintage 132 kV intake.
The engagement: PESO 5-year renewal triggered relay coordination + arc flash + transformer-health re-baselining; existing SLD predated last DCS upgrade.
a USFDA-inspected API plant with Zone 1 process bays.
The engagement: A short-circuit incident at the LT panel during expansion forced unplanned EHS audit; client needed CEng-signed Arc Flash + Coordination study in 18 working days.
a 5 MTPA integrated steel plant with 220 kV captive power + EAF + LF + caster.
The engagement: Coordination drift on the EAF feeder caused nuisance trips on the rolling mill side; harmonic measurement + protection re-grading restored stability.
Buyer questions we hear consistently across PESO-renewal, CEIG-stamp, and OISD-117 conversations in India:
Tell us what scenario you need modelled in India. A simulation lead responds inside 24 hours.
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