Indian electronics manufacturing is scaling fast, from EMS providers to OEMs building controllers, meters, chargers and lighting drivers. Policy is pushing the same way: the Electronics Component Manufacturing Scheme was notified on 8 April 2025 with an outlay of ₹22,919 crore over six years to build a domestic base of components, sub-assemblies and raw materials (PIB, October 2025).
More volume brings a harder problem than finding orders. One PCB assembly can carry hundreds of part numbers, each with alternates, several suppliers, its own lead time and often its own moisture sensitivity and compliance certificate. This guide, for owners, plant heads and supply chain managers, explains where PCB assembly margins leak and how a manufacturing ERP built for electronics, such as ERPDrive for electronics manufacturers, closes each gap.
Why PCB Assembly Margins Leak: Material Is Most of the Cost
In most PCB assemblies, bought-out components are the bulk of board cost and conversion (placement, reflow, testing, labour) is the smaller share. Savings on line efficiency are easily wiped out by one reel bought at the wrong price, one panel built on an old revision, or one tray of ICs scrapped after being open too long.
Electronics problems also surface late. A wrong alternate is placed in seconds but found at test, or in the field months later, and a bad component lot can spread across dozens of work orders before anyone notices. Without a record linking each lot to each batch, every recall is bigger than it needs to be.
Key Takeaway: In electronics manufacturing, margin is decided by component control: buying the right part at the right price, building on the right revision, protecting moisture-sensitive parts and tracing every lot. None of this is visible in a system that only records purchases and invoices.
8 Costly Problems Indian Electronics Manufacturers Face
Problem 1: Shortages Discovered on the SMT Line
The Problem: The line is set up, the stencil is loaded, and then one part number is short. The register said there was enough, but part of it was allocated to another job. The line waits and the setup is done twice.
How ERPDrive Solves It: Component inventory is held by reel, lot and location, and production orders are kitted before they reach the line, with a shortage report for every kit. Minimum stock alerts are based on production demand, and lead time is tracked per supplier, so purchase can act before the shortage reaches the floor.
The Result: Shortages are found at kitting, days before the line is set up. Our guide to material requirement planning explains the planning method behind it.
Problem 2: The Wrong BOM Revision on the Floor
The Problem: PCB designs change often: a component substitution, a layout change, a firmware update. When the latest BOM lives in an engineer's email and the floor works from a printed copy, boards get built on an outdated revision. The cost is rework at best and customer returns at worst.
How ERPDrive Solves It: Every BOM has a full version history, with engineering change notices linked to each revision. Work orders carry the revision they must be built on, outdated revisions are blocked through automatic version enforcement, and the system records which revision was used for each production batch. Multi-level BOMs can be imported from EDA tools and carry reference designators.
The Result: The floor builds what engineering released, and every batch has a revision on record. See our guide to engineering change management.
Problem 3: Substitutes Nobody Approved
The Problem: When a part is short, someone on the floor or in purchase picks an "equivalent". Sometimes it has a different tolerance or rating, and the problem appears only at test or in the field.
How ERPDrive Solves It: Each component has an approved vendor list with primary, secondary and alternate sources, and approved alternates are linked to each BOM line with cross-reference data. Purchase orders are routed to approved vendors, and any deviation from the approved list needs engineering approval before procurement can proceed.
The Result: Substitutions become a controlled decision with a record, not a floor-level guess. Our vendor management guide covers supplier evaluation in depth.
Problem 4: No Trail From Board to Component Lot
The Problem: A customer returns boards with a failing regulator. Without a link from the finished assembly to the component lots inside it, you cannot tell which other batches used the same lot, so you either recall far too much or ship the risk onward.
How ERPDrive Solves It: Every component is tracked by part number, manufacturer, manufacturer lot code, date code and supplier. When components are issued to the SMT line or assembly floor, the system records which lots went into which production batch, giving forward and backward traceability from finished assembly to component lot. Stock is issued FIFO with date code priority.
The Result: A failed lot leads to a known list of batches and customers within minutes. Read more in our guide to batch tracking and traceability.
Problem 5: MSL Floor Life Tracked on Paper
The Problem: Moisture-sensitive components have a limited floor life once their dry pack is opened. Past that limit they must be baked or scrapped, because absorbed moisture can damage them during reflow. When bag-open times are written on the bag, or not at all, exposed parts get used and dry parts get baked for nothing.
How ERPDrive Solves It: ERPDrive records the moisture sensitivity level of each component and starts a floor life countdown from the bag-open timestamp. Rebake alerts are raised as parts approach their floor life limit, and dry cabinet assignment is tracked so you know where every opened reel or tray is stored.
The Result: Exposure is managed by the clock, not by memory, and avoidable rebake and scrap fall away.
See Component Traceability on Your Own BOM
See how ERPDrive tracks reels by lot and date code, enforces BOM revisions on work orders, counts down MSL floor life and links AOI and ICT results to every batch.
Book a Free DemoProblem 6: RoHS and REACH Certificates That Quietly Lapse
The Problem: Export customers and many domestic OEMs ask for RoHS and REACH compliance on finished products. That needs a current certificate for every component from every supplier, and in a shared folder a lapsed one is usually found when the customer asks.
How ERPDrive Solves It: RoHS certificates, REACH declarations and material safety data sheets are stored against each supplier and part number. The system sends expiry alerts before certificates lapse, flags non-compliant components during procurement, and generates a consolidated compliance report for a finished product from its component-level data.
The Result: A customer's compliance request becomes a report, not a week of chasing suppliers.
Problem 7: Test Results That Never Reach the Batch
The Problem: Feeder setups are checked by eye, first article inspection is a signature on a sheet, and AOI and ICT results stay on the test machine. Nobody can say whether a defect pattern belongs to a feeder, a machine, an operator or a component lot, so it keeps coming back.
How ERPDrive Solves It: Before a run starts, the feeder setup is verified against the BOM. First article inspection is logged with a pass or fail result, and production proceeds only after approval. In-line AOI and ICT results and final functional test outcomes are recorded against each panel or batch, with operator and machine mapping, and defect Pareto analysis by component, process and machine.
The Result: First pass yield becomes a tracked number and defects can be traced to their cause. Our guide to rejection analysis and rework shows how to act on it.
Problem 8: Job Work and Board Costs Nobody Can Reconcile
The Problem: Many units send part of the work outside: conformal coating, box build, wire harness or extra SMT capacity. Components go out on a challan and the reconciliation lives in a spreadsheet, if anywhere. Board cost is set once at quotation and rarely checked when component prices move.
How ERPDrive Solves It: Job work challans for outsourced assembly are created in the system alongside GST-compliant invoices with the correct HSN codes, e-invoices and e-way bills. BOM cost roll-ups use current component pricing, purchase prices are compared across vendors, and customer-wise profitability and cost variance reports show where margins have moved. Accounting data syncs with Tally through a two-way integration.
The Result: Material sent out is accounted for, and pricing decisions rest on today's board cost. See our guides to job work management and production costing.
Spreadsheets and Tally vs an ERP Built for Electronics
| Area | Excel, Email and Tally | ERPDrive for Electronics |
|---|---|---|
| Component stock | One quantity per part number | By reel, lot, date code and location, FIFO by date code |
| Shortages | Found when the line is set up | Kitting with a shortage report per production order |
| BOM revisions | Latest file in someone's email | Version history, linked ECNs, revision enforced on work orders |
| Alternates | Chosen on the floor | Approved vendor list, deviations need engineering approval |
| Traceability | Nothing links board to lot | Forward and backward from assembly to component lot |
| MSL parts | Bag-open time written on the bag | Floor life countdown, rebake alerts, dry cabinet tracking |
| Compliance | Certificates in a shared folder | Certificates per part and supplier with expiry alerts |
| Quality | Test data stays on the machine | Feeder check, FAI, AOI and ICT logged per panel or batch |
Electronics Manufacturing KPIs Every Owner Should Track
These eight measures, reviewed weekly by product, customer and line, explain most of the margin movement in a PCB assembly unit. Set targets from your own baseline once the data is reliable.
| KPI | How It Is Calculated | What It Tells You |
|---|---|---|
| First pass yield | Boards passing all tests first time divided by boards tested | Process and component quality at a glance |
| Kit shortage rate | Production orders with a shortage at kitting divided by orders kitted | Planning and purchase discipline |
| SMT line utilisation | Productive line time divided by available line time | Lost time from setups, shortages and breakdowns |
| Component consumption vs BOM | Components issued against what the BOM allows, per order | Attrition, wrong picks and unrecorded scrap |
| MSL rebake and scrap count | Parts rebaked or scrapped for floor life, per month | How well moisture-sensitive stock is handled |
| Certificates expiring in 30 days | Count of component certificates due to lapse | Compliance risk before a customer asks |
| Supplier quality | Rejected components divided by components received, per supplier | Which sources to keep and which to replace |
| Cost variance by customer | Actual board cost against quoted cost | Where component price moves have eaten margin |
How ERPDrive Runs a PCB Assembly Unit End to End
Step 1: Load BOMs With Revisions and Approved Alternates
Import multi-level BOMs from your EDA tools with reference designators, link approved alternate components to each line, and release a revision that every work order will be built on.
Step 2: Buy From Approved Vendors and Receive Into Lots
Purchase orders go to approved vendors, with lead times and prices tracked per supplier and blanket orders for high-volume parts. Incoming components are inspected and received by reel, manufacturer lot code and date code.
Step 3: Kit Work Orders and Protect MSL Parts
Each production order is kitted with a shortage report, components are issued FIFO by date code, and moisture-sensitive parts carry a floor life countdown from bag open with rebake alerts.
Step 4: Verify the Line, Then Build and Test
The feeder setup is checked against the BOM, first article inspection is approved before the run continues, and AOI, ICT and functional test results are recorded against each panel or batch with operator and machine.
Step 5: Invoice, Dispatch and Report
Finished assemblies are invoiced with GST e-invoices and e-way bills, and reports show first pass yield, SMT line efficiency, component consumption, supplier quality and customer-wise profitability.
How to Get Started: A Practical Rollout Sequence
- Clean up the component master. One record per part number, with approved vendors and alternates attached.
- Load BOMs for your running products. Start with your highest-revenue boards.
- Receive every new reel by lot and date code. Traceability starts from the first receipt recorded this way, so start early.
- Kit before the line, every time. No production order goes to the line without a kit and a shortage report.
- Turn on MSL tracking for sensitive parts. Record bag-open times and dry cabinet locations from day one.
- Log FAI, AOI and ICT against batches. Begin with one line, then extend to all lines once the habit is set.
- Review weekly. Yield, shortages, consumption and cost variance, with production, purchase, quality and accounts together.
For a wider view of rolling out an ERP in a factory, read our ERP implementation guide, and see the electronics manufacturing page for the full list of modules.
Frequently Asked Questions
What is an electronics manufacturing ERP?
It is software that runs an electronics unit on one record: component inventory by reel, lot and date code, BOMs with revisions and alternates, approved vendors, MSL floor life, compliance certificates, SMT production and test results, job work, GST invoicing and costing. An accounting package records only purchases and sales.
Can ERPDrive track components by manufacturer lot and date code?
Yes. ERPDrive tracks every component by part number, manufacturer, manufacturer lot code, date code and supplier, and records which lots were issued to which production batch. That gives forward and backward traceability from a finished PCB assembly to individual component lots.
How does ERPDrive stop production on an old BOM revision?
Every BOM keeps a full revision history with linked engineering change notices. Work orders carry the revision they must be built on, outdated revisions are blocked through automatic version enforcement, and the revision used for each batch is recorded.
Does ERPDrive track MSL floor life for moisture-sensitive components?
Yes. ERPDrive records the moisture sensitivity level of each component, counts down floor life from the bag-open timestamp, raises rebake alerts as parts approach their limit, and tracks which dry cabinet each opened reel or tray is assigned to.
Can ERPDrive produce a RoHS compliance report for a finished product?
Yes. RoHS certificates, REACH declarations and safety data sheets are stored against each supplier and part number, with expiry alerts. When a customer asks for compliance data on a finished product, ERPDrive generates a consolidated report from the component-level certificates.
Conclusion: Control the Component, and the Board Takes Care of Itself
A unit that records only what it bought and billed cannot see where its margin goes. Once every reel is received by lot and date code, every work order is built on a released revision, substitutes go through an approved list, moisture-sensitive parts run on a clock and every test result lands on the batch, the leaks become visible, and visible leaks get fixed.
ERPDrive gives Indian EMS providers, OEMs and electronic product manufacturers that control in one cloud ERP. Book a free demo to see it on your own BOMs, or message us on WhatsApp to talk through your factory's setup.