How to implement ERP in an electronics or wiring harness manufacturing company

ERP projects in electronics plants rarely stall because of the software. They stall because the BOMs are not clean, nobody agreed which revision is live, opening stock was loaded without lots, or the floor was asked to record more than it could. The approach below starts with one line and the few records an OEM trace needs, so the project ends with testers and crimp operators actually using it.

Before you start: decide what the system must do on day one

Write down the records your customers and managers ask for most often. For most PCB assemblers and harness makers the list is short: the trace from a delivery to its component lots, test results for a batch, which revision an order was built to, what is short for next week's orders, and the cost of an order. Note for each product whether the customer needs a lot trace or a serial trace. That list defines the first scope.

• Name an owner from the plant, usually the production head, not IT alone.
• Choose the first line: one with steady volume, a willing supervisor, and products customers query.
• Agree what stops when the line goes live, such as the shortage sheet, the test register or the crimp setup sheet.

What data do you need to prepare?

Rates do not need to be exact on day one. A rough figure is enough to plan, and the counts the floor records will show the real rate soon enough. Part reels are different: count them properly, because a wrong opening quantity on a reel shows up as a false shortage at the first kit.

The stages of an implementation

1. Configure the plant as it runs

Work centres, shifts, part masters, BOMs with their revisions and alternates, routings, test plans and reason codes are set up in the plant's own terms. Opening stock is loaded by lot, the accounting sync is connected, and serial-level records are configured for the products that need them. By the end of this stage, a test order should run from kitting to dispatch on the screens.

2. Run the first line on real orders

Operators, testers, supervisors and QC on the first line are trained at their stations, one short session each, and record real work orders while the rest of the plant carries on as before. Gaps show quickly: a routing that needs a separate AOI step, a missing defect code, a test plan with the wrong limit. Fix them the same day.

3. Switch the first line over

The first line now runs on the system alone, and its paper records stop. Planning, kitting, test and cost read what the floor records.

4. Extend line by line

The remaining lines follow the same pattern, often SMT first, then manual assembly and test, then the harness section, or the other way round in a harness plant. The second line is quicker than the first, since the part masters, defect codes and station training already exist.

How long does an electronics ERP implementation take?

It depends on scope, how clean the data is, and the system. A broad enterprise ERP covering finance, global purchasing and several plants is a much larger project than putting production, stock and quality live on one line. FleekERP's implementation plan is built to put the first production line live in 18 days. Bringing across years of transactions from an older ERP, or untangling BOMs with duplicate part numbers and unapproved alternates first, adds time.

Common ERP implementation mistakes in electronics manufacturing

1. Configuring software before understanding the process

Setting up screens before anyone has walked the floor produces a system that matches a template, not the plant. Follow one board and one harness first: where the kit is pulled, where reels go back to stores, where AOI faults go, how a failed board gets back to test. Configure to that, then run it for a few weeks before asking for changes.

2. Poor master-data preparation

Duplicate part numbers for the same component, BOMs with two live revisions, alternates nobody approved, opening stock without lots: each breaks the first kits and the first traces. Clean the masters for the products you start with before go-live. Plants also go wrong the other way, by trying to load every past purchase, issue and test result. Open orders, current stock by lot and active masters are usually enough.

3. Ignoring shop-floor users

Operators, testers and QC make most of the records, and they are often trained last, in a meeting room. Train them at the station on real orders, and keep their entries to the few they need: count, reject with a reason, downtime with a cause, test result. FleekERP's shop floor apps run on Android phones the operator or tester can keep at the bench. Put the line's yield and reject counts in front of the SMT or harness supervisor from day one, so operators see their entries being read. Read how WhatsApp groups end up running the floor for the reporting habits a rollout has to replace.

4. Trying to digitise everything at once

SMT, through-hole, test, harness, stores, purchase and costing on the same day spreads the team too thin to fix problems as they appear. One line running fully on the system is worth more than every line half set up.

5. Unclear BOM and routing ownership

In electronics this is where most trouble starts. If nobody owns the BOM, ECNs are applied in engineering's files but not in the system, or in the system but not on the floor. Name an owner for the BOM (usually engineering) and for the routing (usually production), and agree how an ECN is released: who approves it, from which date or order it applies, and what happens to boards already in WIP.

6. No pilot, or a pilot with no end

Switching SMT, test and harness lines over together means a wrong test limit or missing defect code hits every line on the same morning. One pilot line surfaces those faults while they are still cheap to fix. Set the date its paper records stop, though: a pilot that runs beside the old test register indefinitely becomes a second copy nobody trusts.

7. Measuring software usage instead of operational outcomes

A count of entries tells you the testers are tapping the app. It says nothing about whether yield at test improved or traces got faster. Track the results you bought the system for.

After go-live: what to measure

• The time taken to answer an OEM trace request.
• First-pass yield at test, by product, and whether it is rising.
• Rework by defect cause, reviewed weekly.
• Shortages found before kitting compared with shortages found at the line.
• Stock by lot against the store, especially part reels.
• Delivery against the customer's due date.

The share of production and test recorded at the station is worth watching in the first weeks, as an early sign that the outcomes will follow.

For how the full flow runs once the plant is live, see FleekERP for electronics and wiring harness makers.