Sustainability becomes durable when it is supported by operating capability, not when another KPI is attached to a weak production system.
Manufacturing leaders are often asked to improve quality, delivery, flexibility, cost and sustainability at the same time. The request sounds balanced. The operating reality may not be.
A plant with unstable processes, weak maintenance, unreliable scheduling and inconsistent quality cannot simply add a sustainability target and expect durable performance. It may report improvement for a period, but the underlying system continues to generate rework, expedites, waste, excess inventory and reactive decisions.
A 2017 study by Gold, Schodl and Reiner compared manufacturing capabilities across plants in old and new European Union member states and interpreted the results through the sand-cone model. The classical sand-cone idea proposes cumulative capability development, commonly described as building quality first, then dependability, flexibility and finally cost efficiency while maintaining the capabilities underneath. The authors extended their interpretation to include sustainability in reactive and proactive forms and argued that operating conditions influence the sequence.
The study does not establish a universal capability ladder. Its own authors acknowledge that sand-cone theory lacks universal empirical support and that their dataset, collected between 2006 and 2008, was already historical at the time of publication. The stronger strategic insight is therefore not a fixed sequence. It is that capabilities interact, and sustainability should be designed with the maturity and context of the operating system in mind.
The Strategic Context
Manufacturing strategy is often presented as a set of competing priorities. Lower cost can conflict with flexibility. Faster delivery can pressure quality. Environmental improvements can appear to require capital that worsens short-term cost performance.
The cumulative-capability view challenges the assumption that every improvement is a trade-off. Some capabilities reinforce others when developed in the right way.
Quality can reduce rework. Dependability can reduce buffers and firefighting. Flexibility can reduce the need for expensive emergency responses. Better process control can reduce waste and energy variation. These improvements create a stronger base for later cost and sustainability performance.
This matters because many environmental outcomes are operational outcomes in disguise.
Scrap is both a quality failure and a material burden. Unplanned downtime can increase energy per good unit. Poor scheduling creates expediting and unnecessary transport. Excess inventory embeds materials, space and working capital. Unstable processes make environmental performance volatile.
The implication is that sustainability belongs inside manufacturing capability development, not beside it.
What Leaders Commonly Misread
Sustainability is assumed to be an additional performance dimension
If management adds another metric without changing the operating system, teams are forced to trade one target against another at the point of execution.
A more mature approach asks which existing capabilities make sustainability performance possible. Stable processes, reliable assets, capable people and disciplined data are often prerequisites.
Cost should always come first
The sand-cone model is famous partly because it challenged cost-first thinking. Its logic is that premature cost reduction can damage the capabilities required for sustainable long-term performance.
For example, reducing preventive maintenance may lower expenditure this quarter while degrading dependability, product quality and energy performance later. Cutting training can improve immediate labour cost while increasing process variation and safety risk.
Cost matters. The sequencing question is whether the chosen cost action consumes the capability base that future performance depends on.
A best-practice sequence is assumed to be universal
Gold et al. explicitly use contingency thinking. Their comparison suggested that operating conditions, including labour costs, supply-chain requirements and stakeholder pressure, can influence which capabilities need attention.
This is a warning against copying a capability roadmap from another plant, country or industry without diagnosis.
The appropriate sequence for a high-mix defence manufacturer may differ from a stable food-processing line. A new greenfield plant may need different priorities from a mature facility with strong quality systems but high environmental exposure.
Compliance is confused with sustainability capability
The authors distinguish reactive and proactive sustainability in their interpretation. Reactive sustainability responds to external requirements or pressure. Proactive sustainability goes further and becomes part of competitive capability.
This distinction is valuable for executives.
Compliance asks, "What must we do?"
Capability asks, "What can our operating system reliably achieve and improve?"
The first is a floor. The second can become a source of resilience and differentiation.
Reframing the Issue
Sustainability should be treated as an emergent property of a capable operating system.
That does not mean every environmental issue can be solved through operational excellence. Some require technology substitution, product redesign, capital investment or business-model change. But operational maturity determines whether those strategic changes can be implemented reliably.
The reframing therefore moves from:
"What sustainability target should the plant receive?"
To:
"What capability must the plant build so that the target becomes achievable, repeatable and improvable?"
This is especially important for portfolios of manufacturing improvement. If every plant launches separate cost, quality, digital, energy and waste projects without a capability sequence, initiatives compete for the same people and may undermine one another.
Portfolio leadership should instead identify foundational capabilities and sequence investments around them.
Strategic Analysis: Build the Operating System Beneath the Metric
Quality creates an environmental foundation
Defects consume materials, energy, labour and capacity without creating customer value. Reducing variation therefore has both economic and environmental consequences.
A plant that cannot hold process parameters within control will struggle to hold environmental performance within control as well.
This is why sustainability teams should care about first-pass yield, standard work and process capability even when those measures sit outside the environmental dashboard.
Dependability reduces the cost of instability
Unreliable equipment and schedules create compensating behaviours: extra inventory, overtime, expedited freight, redundant capacity and emergency maintenance.
These behaviours may protect customer delivery while increasing resource use.
Improving dependability can therefore create environmental headroom indirectly. The benefit is not automatically guaranteed, but the causal pathway should be examined.
Flexibility can reduce or increase environmental burden
Flexibility is not inherently sustainable. High flexibility can avoid overproduction and allow better response to demand, but it can also create frequent changeovers, small batches and inefficient equipment utilisation.
The question is whether flexibility is designed into the process or purchased through wasteful buffers and human firefighting.
This is where engineering judgement matters. Capability labels alone are insufficient.
Proactive sustainability requires strategic choice
Once foundational operations are stable, sustainability can move beyond compliance into design and investment decisions.
A manufacturer may redesign a process to eliminate a hazardous input, change product architecture to reduce material intensity, develop closed-loop recovery or work with suppliers to alter upstream impacts.
These are no longer housekeeping initiatives. They affect capital, technology, sourcing and competitive position.
Related article: Waste Is Not a Resource Until the System Can Capture Value
Organisational culture can override regional assumptions
Gold et al. discuss both regional context and prior research suggesting organisational culture can have a stronger effect on manufacturing performance than national culture in some settings. For executives expanding across regions, this is important.
Context matters, but it should not become an excuse for low capability. Management still shapes standards, learning systems, investment priorities and behavioural expectations.
Decision Framework
A manufacturing leadership team can assess capability in five layers.
| Layer | Diagnostic question | Typical failure signal |
|---|---|---|
| Stability | Are core processes predictable? | Variation, defects, reactive control |
| Dependability | Can assets and schedules be relied upon? | Downtime, expediting, buffers |
| Flexibility | Can the system adapt without excessive loss? | Changeover waste, firefighting |
| Efficiency | Can resources be reduced without damaging lower layers? | Cost cuts that create hidden failure |
| Sustainability | Can environmental performance be improved proactively and repeatedly? | Compliance-only activity, isolated projects |
This is not a universal sequence. It is a diagnostic scaffold.
A mature plant may already have strong quality and dependability but weak energy visibility. Another may have excellent environmental technology but unstable work practices. The correct next investment depends on the constraint.
Leaders should also classify sustainability requirements as:
- reactive: legal, customer or stakeholder requirements that must be met;
- proactive: capabilities the organisation chooses to build for resilience, cost, innovation or competitive advantage.
The distinction clarifies why the work is being funded.
From Strategy to Execution
Immediate action
Take the plant's major sustainability targets and identify the operational capabilities they depend on. If scrap reduction assumes stable tooling, reliable measurement and operator standard work, make those dependencies explicit.
Stop launching environmental projects that compete with unresolved foundational failures unless the environmental risk itself requires immediate intervention.
Medium-term capability building
Create an integrated manufacturing capability roadmap covering quality, maintenance, scheduling, flexibility, resource efficiency and sustainability. Sequence projects by dependency rather than departmental ownership.
Use common measures that reveal joint value. For example, track material loss per good unit rather than only total scrap tonnage where appropriate.
Long-term strategic positioning
Move sustainability from reactive compliance to design capability. Build engineering, procurement and operations competence that can redesign products and processes rather than continually mitigating the consequences of the existing system.
At portfolio level, allocate capital toward plants and technologies where capability development unlocks several outcomes simultaneously.
Related article: Sustainable ERP Is an Enterprise Transformation, Not a Reporting Upgrade
Signals to Monitor
Watch for:
- sustainability projects repeatedly failing because basic process stability is absent;
- cost reductions causing more defects, downtime or waste;
- environmental performance varying widely between shifts or products;
- excessive reliance on operator heroics to maintain delivery;
- compliance actions disconnected from improvement capability;
- multiple improvement programs competing for the same technical resources;
- plants copying capability roadmaps without considering local conditions;
- environmental metrics improving while operational instability worsens elsewhere.
Questions for the Leadership Team
- Which operational capability is the real constraint behind our sustainability target?
- Are we cutting cost in a way that consumes quality, dependability or flexibility?
- Which sustainability activities are reactive obligations and which are proactive strategic capabilities?
- What plant-specific conditions should alter the sequence of capability investment?
- Which improvement projects create benefits across quality, cost and environmental performance simultaneously?
- Are we building a system that can improve sustainability repeatedly, or delivering isolated projects?
Closing Perspective
Sustainability is easy to add to a scorecard and difficult to build into an operating system.
The cumulative-capability perspective provides a useful discipline because it forces leaders to ask what sits underneath the target. Quality, dependability, flexibility and efficiency interact with environmental outcomes, but the sequence should be diagnosed rather than copied mechanically.
A capable plant does more than meet a sustainability requirement. It can understand the causes of resource loss, absorb new technology, improve reliably and convert environmental pressure into better design decisions.
That is the difference between a sustainability target and a sustainability capability.
Source References
- Gold, S., Schodl, R. & Reiner, G. 2017, 'Cumulative manufacturing capabilities in Europe: Integrating sustainability into the sand cone model', Journal of Cleaner Production, vol. 166, pp. 232-241, doi:10.1016/j.jclepro.2017.08.028.
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