Improving Supply Control and Quality via EVA In-House Production Assessment

Assessment

 Executive Summary

Interface Australia Pty Ltd is a leading manufacturer of modular carpet tiles, committed to delivering sustainable, high-performance flooring solutions. As part of its ongoing operational excellence and cost transformation strategy, this project proposes the in-house compounding of Ethylene-Vinyl Acetate (EVA), a critical raw material in carpet tile backing to address recurring quality inconsistencies, reduce material cost volatility, and enhance supply chain control. The proposed initiative supports Interface’s broader goals of supply chain resilience, quality assurance, and value engineering.

Currently, Interface sources pre-mixed EVA from a single external supplier based in Melbourne. This supplier pre-mixes EVA (including ATH, polymer, zinc, soap and water) and delivers it via road tankers to Interface’s Minto site. While this supplier delivers approximately $4M worth of EVA annually, frequent quality deviations have impacted production output and customer experience. These issues culminated in a $2.1M product quality claim, highlighting systemic risks in quality control, traceability, and over-reliance on a single external compounding partner. An internal feasibility review concluded that bringing EVA mixing in-house could ensure consistency, create up to $962–968K in annual savings, and reduce overreliance on a sole vendor.

The total capital investment for this transition is estimated at AUD 3 million, which includes a contingency allocation of $50,000 for a temporary EVA mixing setup to ensure uninterrupted production during the facility upgrade. The project is scheduled to commence on 5 January 2026, with construction, commissioning, material testing, and operator training throughout 2026. Operational go-live for the permanent line is targeted for early Q1 2027.

A comprehensive risk assessment has been conducted using the STEEPLED framework, identifying macroeconomic, environmental, political, and labour-related risks, such as global freight disruption, raw material price volatility, labour shortages and regulatory compliance obligations. These risks are mitigated via a procurement-led strategy, including dual sourcing, robust contracting, ethical supply chain due diligence and structured project governance. A clear stakeholder engagement plan, built on Mendelow’s power–interest framework and a RACI model, ensures that procurement, engineering, operations, finance, quality, sustainability, and external suppliers are aligned and accountable at each stage.

Financially, the project demonstrates strong viability. Based on 2.6 million square metres (SQM) of annual production, an estimated saving of $0.37 per SQM delivers around $962K in yearly benefits. Over a five-year horizon, the Net Present Value (NPV) at an 8% discount rate is approximately $840K, with a payback period of around 3.1 years, which fits within Interface’s investment hurdle range for capital projects. Beyond the quantified savings, the project strengthens quality control, innovation capability and sustainability outcomes.

Similar transformations in other manufacturing sectors, such as in-house adhesive mixing in packaging, resin compounding in automotive, and surfactant blending in FMCG, show that internalising critical material processes can provide cost control, better formulation IP protection, and improved agility. This proposal positions Interface Australia to follow a comparable path of vertical integration, aligned with its global Climate Take Back™ ambition and local operational needs.

In summary, this project is a strategic investment that delivers both financial return and operational resilience. It strengthens Interface’s competitive position, reduces risk exposure tied to a single EVA supplier, and provides a platform for ongoing innovation in product performance and sustainability.

Section 2 Introduction & Organisational Context

Organisational Overview

Interface Australia Pty Ltd operates as part of Interface Inc., a global leader in modular carpet tile manufacturing with a footprint spanning more than 100 countries. The Australian division, headquartered in Minto NSW, plays a pivotal role in supplying commercial, institutional, and government customers across the ANZ region. Interface is globally recognised for its sustainability leadership, guided by the Climate Take Back™ vision, which commits the company to reversing global warming through innovative material design, low-carbon manufacturing, and regenerative supply chains (Interface Inc., 2023).

The Minto plant produces carpet tiles using a multilayered backing system where Ethylene Vinyl Acetate (EVA) is a critical chemical component. EVA ensures adhesion, flexibility, dimensional stability, and acoustic performance functional attributes that directly shape customer satisfaction and warranty outcomes. Production reliability, process capability, and quality control measures are therefore central to operational success. As outlined in manufacturing quality frameworks, defective or inconsistent backing materially increases the cost of poor quality (Juran, 2016).

Given Interface’s strategic direction to decarbonise and innovate, procurement and engineering functions increasingly engage in strategic problem-solving, particularly for high-risk materials. EVA represents one of those categories: it is chemically complex, cost-intensive, technically sensitive, and has a direct impact on product failure rates and customer perception.

Procurement Context and Category Structure

Interface Australia manages procurement using a category management model, which aligns with principles for strategic sourcing and risk-led decision-making (CIPS, 2020). Categories are structured into Raw Materials, Packaging, Indirect, and Services. EVA sits within the Raw Materials, Backing category, alongside PVC, DINCH, limestone, carbon black, and other additives.

Procurement’s role in EVA sourcing extends beyond price negotiation. EVA is:

• Highly technical
• Safety-critical
• Difficult to substitute
• Subject to external market volatility
• Central to finished product performance

This aligns EVA with what the Kraljic Matrix identifies as a Strategic item, high risk, high value, and requiring long-term security, partnership, or internal capability development (Kraljic, 1983). Treating EVA as a simple transactional buy, therefore, exposes the business to unnecessary supply chain and quality risks.

Section 3 Business Case & Financial Justification

Introduction

A robust and evidence-based business case is essential for justifying the AUD 3 million investment required to bring EVA compounding in-house at Interface Australia. This section develops the financial, strategic, and risk-adjusted rationale using recognised procurement and project management frameworks, including Total Cost of Ownership (TCO), Net Present Value (NPV), Payback Analysis, Cost Modelling, and Make-or-Buy evaluation (CIPS, 2020).

The business case is strengthened further by the strategic alignment between EVA internalisation, Interface's supply chain resilience goals, sustainability commitments, and the global trend towards vertical integration in manufacturing (Accenture, 2022).

EVA is a high-impact material category whose failure can disrupt production, increase scrap, damage customer relationships, and generate significant financial and reputational losses. The historic $2.1 million defect claim associated with EVA quality failure highlights the urgency and strategic significance of this investment.

Current EVA Cost Structure and Visibility Challenges

Interface currently purchases pre-mixed EVA from a single Melbourne-based supplier. This model masks the true cost components behind a bundled price, combining polymer, ATH, zinc, additives, labour, overhead, mixing costs, logistics, and supplier margin. This structure restricts the ability of procurement to:

• Identify cost drivers
• Benchmark global polymer and ATH markets
• Validate supplier price increases
• Build an accurate should-cost model
• Negotiate based on transparent data

Opaque pricing contradicts procurement best practice, which encourages cost breakdown structures (CBS) and transparent negotiations to eliminate unnecessary margin leakage (Monczka et al., 2016).

Current EVA pricing is believed to include:

• Margin loading from the supplier
• Risk premiums
• Inefficiencies in supplier operations
• Costs associated with supplier equipment downtime, maintenance, or scale constraints

Brief summary of assessment requirements (key pointers)

The assessment requires a professionally structured business-case style dissertation focused on in-house compounding of EVA for Interface Australia. Core requirements and key pointers to be covered are:

• Executive summary concise project synopsis, strategic rationale, headline financials and recommended decision.
• Introduction & organisational context company background, plant role, product importance of EVA and why the problem matters.
• Problem statement & drivers description of recurring quality deviations, single-supplier risk, historic $2.1M quality claim, and need for control.
• Scope and objectives what the study covers (make-vs-buy for EVA, capital investment, timelines) and what it excludes.
• Market / procurement context category analysis (Kraljic), supplier landscape, cost visibility issues and TCO considerations.
• Business case & financial justification cost model, savings estimate ($0.37/SQM → ~$962–968K pa based on 2.6M SQM), capital ask (AUD 3M, $50k contingency), NPV (~AUD 840K @8%), and payback (~3.1 years).
• Implementation plan & timeline start date (5 Jan 2026), construction/commissioning/training across 2026, go-live early Q1 2027, temporary mixing contingency.
• Risk assessment & mitigation STEEPLED analysis (macro, environmental, supply, labour, regulatory) and procurement mitigations (dual sourcing, contracting, due diligence).
• Stakeholder engagement & governance Mendelow power–interest mapping, RACI model and project governance.
• Comparative benchmarking examples of similar vertical integrations and strategic benefits.
• Conclusions & recommendations final decision rationale and next steps.

How the Academic Mentor guided the student step-by-step (brief explanation of each section)

1. Kick-off: Clarify purpose & audience

• What mentor did: Explained the assessment’s aim (a decision-focused report for senior stakeholders) and university expectations (evidence, academic referencing, professional tone).
• Benefit to student: Set scope, tone and deliverable format before research began.

2. Frame the Executive Summary

• Action: Co-wrote a one-page executive summary capturing the problem, recommended action (in-house compounding), headline finances and key risks.
• Why: Ensures the report leads with a clear recommendation senior managers can act on.

3. Develop Introduction & Organisational Context

• Action: Guided student to extract and synthesize company background (Interface, Minto plant), product role of EVA, and strategic alignment with Climate Take Back™.
• Why: Grounds the technical case in company strategy and operational reality.

4. Define the problem statement and objectives

• Action: Helped the student state the problem (quality deviations, $2.1M claim, single-supplier exposure) and write SMART research objectives (evaluate feasibility, quantify savings, propose implementation plan).
• Why: Clear problem + SMART objectives sharpen analysis and measurement criteria.

5. Structure the procurement & category analysis

• Action: Taught how to apply Kraljic and category management logic to position EVA as a strategic, high-risk item. Student mapped cost drivers and opacity issues.
• Why: Demonstrates procurement thinking beyond price integrating risk and strategic sourcing.

6. Collect and analyse data for financial modelling

• Action: Mentor showed stepwise cost-build: current spend, assumed per-SQM savings ($0.37), annual production (2.6M SQM), capex estimate (AUD 3M), contingency, discount rate (8%). Student then built NPV and payback calculations.
• Why: Empowers student to justify investment numerically and transparently.

7. Conduct risk assessment (STEEPLED) and mitigation planning

• Action: Walked through macro to operational risks, ensured each risk had a corresponding mitigation (e.g., dual sourcing, contractual protections, procurement due-diligence). Student documented likelihood and impact.
• Why: Demonstrates credible project planning and governance awareness.

8. Design stakeholder and governance plans

• Action: Mentor introduced Mendelow’s mapping and a RACI matrix; student assigned roles for procurement, engineering, QA, operations, finance and suppliers.
• Why: Shows practical change management and accountability.

9. Benchmarking and strategic positioning

• Action: Student was guided to include sector analogues (in-house adhesive/resin compounding) to illustrate precedent and expected benefits (IP protection, agility).
• Why: Strengthens the strategic argument with real-world comparators.

10. Draft review, referencing and academic polish

• Action: Iterative feedback cycles focused on clarity, evidence attribution (Juran, CIPS, Kraljic), formatting, and ensuring present-tense chapter overviews. Mentor checked that conclusions tied back to objectives.

• Why: Ensures academic rigour, readability and compliance with assessment rubrics.

How the outcome was achieved what the student delivered

Working with the mentor, the student produced a complete assessment that met the requirements and academic standards. Key outcomes included:

• Executive Summary that recommends moving EVA compounding in-house and summarises financials and risks.
• Clear problem articulation referencing the $2.1M quality claim and the operational impacts of supplier dependence.
• Quantified business case: capital requirement AUD 3.0M (with $50k temporary setup contingency), annual savings ≈ $962–968K, saving $0.37/SQM on 2.6M SQM production, NPV ≈ $840K @ 8%, payback ≈ 3.1 years.
• Realistic implementation timeline: project start 5 Jan 2026, construction/commissioning/operator training across 2026, permanent line go-live early Q1 2027.
• Comprehensive STEEPLED risk register with assigned mitigations and procurement-led responses (dual sourcing, contracting, due diligence).
• Stakeholder engagement plan using Mendelow’s framework and a RACI matrix for accountability.
• Procurement and TCO analysis that exposed opaque supplier costing and supported a should-cost approach.
• Benchmarked case examples tying vertical integration to operational and IP benefits.
• Polished report structure with present-tense chapter overviews and academic referencing.

Learning objectives covered

By completing the assessment under mentor guidance, the student demonstrated and learned to:

1. Formulate a strategic problem statement linking operational quality to supply-chain risk.
2. Apply procurement frameworks (Kraljic, category management) to real business decisions.
3. Develop a robust business case including TCO, NPV and payback analysis.
4. Perform risk assessment and mitigation planning using STEEPLED and procurement strategies.
5. Design stakeholder governance using Mendelow and RACI to enable project execution.
6. Synthesize technical and managerial evidence into a concise Executive Summary and structured report.
7. Communicate professional recommendations in a format fit for senior management and academic assessment.
8. Apply academic rigour citing sources, structuring chapters, and meeting assessment criteria.

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