When a customer complains, your company has 48 hours to convert that dissatisfaction into loyalty — or a negative review. ISO 10002 gives you the structured system to achieve it; Summum Calidad guides you all the way to certification.
ISO 10002:2018 is the international quality management standard focused on the handling of customer complaints and claims. Published by ISO and adopted in Spain as UNE-ISO 10002, it establishes guidelines for any organisation to receive, record, analyse and resolve customer dissatisfaction in a fair, transparent and traceable manner. It does not set numerical satisfaction thresholds: it defines the process that ensures no complaint is lost, each one receives a timely response, and the data feeds into continuous improvement.
The problem it solves is concrete: most SMEs handle complaints reactively and on an ad hoc basis, with no unified register, no formal deadlines, no root-cause analysis and no reporting to management. The result is the same complaint recurring again and again, customers who leave without warning, and no objective evidence to present against a legal claim or during an audit by a corporate client. ISO 10002 closes that gap. Furthermore, the standard integrates seamlessly with ISO 9001 — its PDCA cycle structure is fully compatible — and adds the specific voice-of-the-customer module that the generic quality standard leaves to each organisation to define.
Who benefits most? Service companies (consulting, logistics, retail, hospitality, clinics, telecommunications) with high volumes of after-sales interactions; organisations targeting contracts with large accounts or public tenders that require proof of customer-care maturity; and any SME holding ISO 9001 that wants to demonstrate its complaints handling has the same rigour as its quality management. Certification is issued by an ENAC-accredited body (AENOR, Bureau Veritas, SGS, TÜV…); Summum Calidad acts as the consultancy that designs the system, trains the team and ensures the first audit holds no surprises.
We analyse how the company currently handles complaints: intake channels, response times, existing records, owners and metrics. We identify the gaps against ISO 10002:2018 requirements and produce the implementation plan with clear milestones and responsibilities.
We define the complaints-handling policy, the official intake channels (email, web form, in-person, telephone), the documented record–acknowledgement–analysis–resolution–closure workflow, and the dashboards with indicators for timeliness, typology and post-resolution satisfaction. We train all staff with customer-facing roles.
We support the first live operating cycle: we review the records, carry out root-cause analysis of the most recurring complaints and prepare the management review report. In this phase the system proves it works before being exposed to the external audit.
We coordinate the selection of an ENAC-accredited certification body, prepare documentation for Stage 1 and Stage 2 audits, and manage any non-conformities until they are closed. Once certification is obtained, we plan the annual surveillance audits to maintain it.
The operational detail: what we deliver as part of the work and what we keep alive afterwards.
Complaints policy and procedure
Management-approved policy document, documented handling procedure and registration forms adapted to the company's intake channels.
Intake channels and acknowledgement
Definition of official channels (digital, in-person, telephone), acknowledgement templates with committed deadlines and prioritisation criteria based on severity.
Analysis and resolution workflow
Process map with an owner for each stage, escalation criteria, maximum deadlines by complaint type and evidence records of the actions taken.
Root-cause analysis and trend monitoring
Complaint classification methodology by typology, periodic Pareto analysis and detection of systemic issues that feed into corrective actions.
Management dashboard and reporting
Key indicators: on-time resolution rate, average closure time, re-opening rate and post-resolution satisfaction. Quarterly report for management review.
Team training and internal audits
Training session for customer-facing staff and process owners, plus execution of the pre-certification internal audit with a findings report.
ISO 10002 closes the quality loop that ISO 9001 opens: when the complaints system produces structured dissatisfaction data, Summum IA can analyse it automatically, and Summum Consultoría can integrate it into the customer-compliance programme.
ISO 10002 formalises the customer-satisfaction module that ISO 9001 requires but does not detail; both standards can be audited in an integrated manner.
View service → iaAutomatic sentiment analysis of complaint texts speeds up typology classification and detects dissatisfaction spikes before they escalate.
View service → calidadThe outsourced internal audit service includes the annual review programme for the ISO 10002 system and verification of customer-care indicators.
View service →It is independent: any organisation can certify to ISO 10002 without holding ISO 9001. In practice, however, many companies implement it in an integrated manner with their ISO 9001 system because they share the documentary structure, quality policy and management review cycle. If you already hold ISO 9001, implementing ISO 10002 is faster because the base management system is already running.
No. Summum Calidad is a consultancy: we design, document and prepare the system. The certificate is issued by an independent certification body accredited by ENAC (Entidad Nacional de Acreditación), such as AENOR, Bureau Veritas, SGS or TÜV Rheinland. This separation of roles is what gives the certificate its validity with clients and in public tenders.
For an SME with no prior management system, the full process from diagnosis to certificate typically takes between 3 and 5 months. If the company already has ISO 9001 in place, timescales are shorter because much of the documentary structure and internal audit habits already exist. The final timeline also depends on the internal team's availability for interviews and document review.
The standard does not require auditing the past, but it is advisable to review the incident and complaint history from the last 12 months before designing the system: that data reveals the most frequent typologies and allows calibration of resolution deadlines and register categories. We do this as part of the initial diagnosis.
Yes. Public procurement specifications that include quality requirements for customer care or for services with high user volumes (e-government, social services, public logistics) value ISO 10002 certification as objective evidence of complaints-management maturity, especially when the contract includes service-level indicators (SLAs) linked to penalty clauses.