Discrete Event Simulation

Capex ROI Evaluation

Pre-investment decision-grade evidence for major capex programmes.

Before you commit ₹50 Cr to a new line, ₹100 Cr to a new caster, or $20M to a new STS crane · simulate it. Throughput uplift, payback period, sensitivity to demand. Decision-grade evidence for the board, not a pitch deck of vendor claims.

Why this matters

Why a vendor's throughput claim isn't decision-grade evidence

Every capex pitch comes with throughput claims. The new machine does 120 units/hour · so the line throughput goes up 25%, right? Wrong half the time. The new machine starves on inadequate upstream supply, or blocks on inadequate downstream buffer, or hits a different bottleneck that the throughput uplift exposes. The vendor's number is a machine capability, not a system outcome. Discrete event simulation gives you the system outcome · how much throughput will you actually realise from this capex, in your line, under your product mix, with your operating constraints? Used by every F500 plant in our roster for capex committee evidence.

Method

How we deliver Capex ROI Evaluation

CEng MIE India-signed deliverables · LiDAR-powered where applicable · digital twin handover ready · routes to the Discrete Event Simulation practice lead within 24 hours.

Baseline calibration

Current line modelled and validated to historical throughput within tight tolerance.

Capex scenario encoding

Each capex alternative encoded · the new equipment, modified routings, expanded buffers, automated handling, whatever the capex case proposes.

Throughput uplift evaluation

Each scenario run to compute realistic throughput uplift · not vendor-claim, but in-context simulation result.

Sensitivity analysis

What if demand grows / falls? What if product mix shifts? What if reliability is below vendor claim? Throughput uplift bounded under realistic uncertainty.

Payback + IRR + board pack

Capex + operating cost + throughput value tabulated. Payback, NPV, IRR computed. Board-ready evidence pack. CEng MIE-signed.

Standards + compliance

Built to the standards your auditors quote

Reports reference the international and national standards your regulators, F500 audit teams, and corporate process safety leads cite. Every deliverable signed by a Chartered Engineer (CEng MIE India).

ISA-95 (manufacturing reference)
BPMN process modelling
VV&A IEEE 1730
ISO 22400 KPIs
Internal capex committee evidence requirements (varies by F500)

Anonymous case anchors

What this looks like in production

Three anonymised engagements from our verified roster · quantified outcomes, no client names disclosed without written permission.

Steel plant, India · ₹85 Cr caster upgrade

Simulated throughput uplift = 18% vs vendor-claimed 30%. Capex case rejected → savings of ₹85 Cr deferred until upstream EAF programme also funded.

Port, KSA · STS crane addition $14M

Simulated 9% TEU/hr uplift vs claimed 15%. Capex deferred 12 months pending RTG bottleneck resolution. $14M saved short-term.

Pharma, Singapore · packaging line

Simulated 22% line throughput uplift validated vendor claim. Capex committee approved with confidence.

Frequently asked

Capex ROI Evaluation · the practical questions

How is this different from a vendor's throughput proposal?

The vendor proves what their equipment can do. We prove what the system will do · which is a different number, sometimes very different. The system result depends on supply, buffer, mix, reliability, scheduling · all things the vendor's number doesn't capture.

Can you evaluate alternatives independently?

Yes · this is often where we earn our keep. Multiple vendors competing, each claiming superior throughput, all with credible spec sheets. Simulation cuts through the marketing and gives you the system outcome for each option.

What level of certainty does the simulation give?

We deliver a range (best / likely / worst) and the sensitivity to key assumptions. The capex committee should not see a single point estimate · they should see the range and the drivers, so they can make a risk-adjusted decision.

Is this required before every capex decision?

Recommended for any capex > $5M (or ₹20 Cr) where throughput uplift is the primary justification. Mandatory in F500 firms with mature capex committee processes.

Why 'evaluation' instead of just 'simulation'?

Because what the board buys is evidence to make a decision · not an animation. The deliverable is the evidence pack, not the model. The model is the engine that produces the evidence.

Scope your Capex ROI Evaluation engagement.

Tell us your plant, region, and scope · a named Chartered Engineer responds within 24 hours.

4 fields. No phone interview to start.
Per-discipline routing to the Discrete Event Simulation practice lead.
Anonymous case anchors sent with first reply.
Same-day callback for deadline-driven enquiries.

Simulation / Evaluation Scoping

FlexSim · AnyLogic · Simio · decision-grade ROI evaluation.