Service supply chain maturity

Why service supply chain maturity matters more than ever

Spare parts management has become significantly more complex over the past decade. Asset portfolios are more diverse, product lifecycles are shorter, service expectations are higher, and supply chains are under constant pressure. At the same time, organisations are expected to maintain high uptime while reducing working capital and operational costs. These competing objectives make spare parts management a strategic discipline rather than an operational afterthought.

Poor inventory decisions directly affect business performance. Excess stock locks up working capital. Insufficient availability leads to downtime, expedited transport and dissatisfied customers. Inconsistent policies create noise in planning systems and reduce confidence in data-driven decision-making. In a service supply chain, these effects compound quickly.

Yet many organisations struggle to understand why their spare parts performance looks the way it does. Without clear visibility into current capabilities, improvement initiatives remain fragmented. This is where maturity becomes relevant. Understanding your maturity level provides context, prioritisation and direction.

A structured supply chain diagnostic helps organisations identify where they stand today and where the largest improvement potential lies. Rather than jumping to solutions, it creates insight into root causes and structural gaps.

This article explains what service supply chain maturity is, how to assess it, and how a service supply chain perspective supports sustainable improvement.

What is service supply chain maturity?

Service supply chain maturity describes how effectively an organisation manages spare parts across the full supply chain. It reflects not only operational outcomes, but also the underlying capability to make consistent, scalable and well‑informed decisions.

Higher maturity is closely linked to better performance. Mature organisations are better at balancing availability and cost, responding to change, and scaling operations without losing control. They rely less on individual experience and more on structured processes, data and governance.

In low‑maturity environments, decisions are often reactive. Inventory levels are adjusted when issues arise. Data is available, but not trusted or consistently used. In contrast, mature organisations apply clear inventory strategies, supported by reliable data and shared decision frameworks.

The goal of the maturity scan is to assess the maturity of your organisation’s spare parts management and develop a roadmap for improvement. This is done by applying the PCOI framework to all relevant areas of the service supply chain, see figure below.

On every area of the service supply chain, we evaluate:

What processes and procedures exist and if they are sustainably and effective.
What controls measures and Key Performance Indicators (KPI’s) are used and if possible compare these with industry benchmarks.
What organisation is set-up to execute the processes, in terms of dedicated roles, responsibilities, competences.
What supporting (IT) systems are available and if they are utilised correctly and effective.

Our maturity scan is designed to assess these dimensions in a structured way, helping organisations understand where they stand today and where the biggest improvement potential lies.

The 4 levels of service supply chain maturity

Gordian views the maturity of spares management as a journey rather than a checklist. While maturity models are often described in multiple detailed steps, in practice organisations move through four levels of maturity: Fire Fighting, Stabilising, Optimising, and Excellence. Each level reflects a clear shift in how inventory decisions are made, governed and improved.

Fire Fighting: Processes are not under control

The first level of maturity is typically recognised by:

Chaotic master data: lots of uncoded spend, many duplicates and insufficient part descriptions.
A messy warehouse: no dedicated receiving and/or issuing areas, no monitoring on storage conditions.
Downtime due to spares: many stockouts, large differences between physical and registered inventory, stocking parameters are determined on gut-feeling.

Stabilising: Processes are barely under control

When basic processes are in place, organisations move to the second level of maturity.

Starting with proactive maintenance: simple and repetitive maintenance is planned, mainly using Excel.
Committed stores controller: although spares availability is reasonable, the warehouse completely relies on the experience of one employee instead of having well-defined inventory control processes.
Standardised replenishment process: most materials arrive on time, but buyers spend a lot of time evaluating purchase requests.

Optimising: Processes are under control and improvements are continuously identified and implemented. When most departments have well-documented processes in place, they start to have time for continuous improvement. Typical improvement projects include:

Improve stock accuracy: with the help of cycle counting and clear segregation of roles, the warehouse inventory is accurately registered in the ERP system.
Master data cleaning: part descriptions are standardized; supplier lead times and pricing are monitored proactively.
Material reservations: maintenance engineers plan their maintenance tasks and register item requirements accordingly.

Excellence: You have achieved operational excellence

To reach this final level of maturity, departments operate in a continuous improvement mode, with resilient processes and the ability to anticipate and adapt to changes.

Excellent master data: rules and guidelines are adhered, phase-in and phase-outs are actively managed.
More than a warehouse: the warehouse is considered a proud logistic service provider offering an array of services than just stocking of parts.
Excellent inventory control function: decisions are data-driven and supply chain risks are proactively spotted and mitigated.

How to assess your current level

Assessing service supply chain maturity requires a structured and objective approach. Organisations typically do this through a supply chain scan that evaluates all relevant aspects of a service supply chain: from warehousing to procurement to master data management.
Key questions include:

What is the quality of master data? Are naming conventions consistently applied? Are there duplicate parts?
Is maintenance planning directly linked to material planning?
Are recommended storage conditions considered in the warehouse?
Are inventory levels periodically evaluated?
What percentage of spare parts fall under a supplier contract?
How well do departments collaborate across the service supply chain?

A structured supply chain scan combines data analysis, stakeholder interviews and process reviews. The goal is not benchmarking for its own sake, but identifying maturity gaps that explain current performance.

Common gaps in spare parts inventory strategies

Across industries, similar gaps appear regardless of sector or asset types.

A common issue is an overemphasis on inventory reduction without understanding the risks. This leads to short‑term savings but long‑term service issues. Another frequent gap is the lack of differentiation between critical and non‑critical parts, resulting in uniform strategies for very different items.

Misalignment between departments is also widespread. Without shared objectives, decisions optimise locally but not end‑to‑end. Many organisations operate without meaningful performance metrics beyond total inventory value, and structured review cycles are often missing.

These gaps limit the effectiveness of inventory strategies and slow down maturity development.

Why a service supply chain perspective is essential

Traditional supply chain management focuses on stable demand, efficient flows and turnover optimisation. Spare parts operate under fundamentally different conditions: intermittent demand, long lifecycles and high availability requirements.

A service supply chain perspective recognises this difference. It connects spare parts decisions directly to uptime, customer satisfaction and lifecycle cost performance. Without this perspective, organisations apply inappropriate models and misinterpret performance signals.

Spare parts require specialised approaches that explicitly balance risk and cost. This is where maturity and diagnostics add value.

When to perform a supply chain diagnostic

Certain situations act as clear triggers for a supply chain scan:

Declining service performance
Increasing inventory levels or costs
Rapid organisational growth
Digital transformation initiatives
Mergers or acquisitions
ERP implementations
Increasing service supply chain complexity

In these moments, maturity insight prevents reactive decisions and creates direction.

Our advice

Service supply chain maturity insights enable better decisions. Without understanding current capability, improvement initiatives remain fragmented. A structured maturity scan creates visibility, prioritisation and momentum.

Our advice is to:

Perform a supply chain scan (our online Spares Supply Chain Check is a good start)
Speak to an expert
Explore maturity benchmarking

Improving spare parts performance starts with understanding where you stand.