1. IT risk analysis: Methods, examples, and risk assessment for practical application
2. Definition: What is a risk analysis?
3. What value does an IT risk analysis offer?
4. Risk analysis according to ISO 27001
5. Likelihood of occurrence and extent of damage in IT risk assessment
6. IT risk analysis: Real-world business example
7. IT-Grundschutz as a German standard for IT risk analysis
8. Best practices for a structured risk analysis
9. Deriving protective measures from the risk analysis
10. Risk analysis as a regulatory requirement for IT compliance
11. Software-supported risk analysis with i-doit
12. Achieving robust IT security through risk analysis
IT risks are ubiquitous today and can severely impact business operations. Whether it is a ransomware attack, an undetected vulnerability, or an unexpected system outage—a single event is often enough to bring critical processes to a standstill. This is precisely where risk analysis comes in: it systematically uncovers potential threats, evaluates likelihood of occurrence and potential impact, and creates the foundation for effective protective measures.
Regardless of whether companies align with ISO 27001, BSI IT-Grundschutz, or other frameworks: A methodical IT risk assessment is always the starting point for effective risk management. This is all the more true in an IT landscape that appears increasingly complex and where cyberattacks are becoming ever more professional. Learn now how to build an IT risk analysis step by step and keep risks manageable over the long term.
By definition, a risk analysis describes a process for identifying, evaluating, and prioritizing risks to detect threats to data and systems before damage occurs. It considers both technical and organizational aspects. At the core of every risk assessment lies the protection of the following security objectives: confidentiality, integrity, and availability of information. A methodical risk analysis provides answers to crucial questions: Which assets are critical? Where are vulnerabilities located? Which threats are realistic, and what would be the consequences of an incident?
Informed decisions: You gain a clear overview of the threat landscape and can make targeted investments where the risk is highest. A good IT risk analysis example is the prioritization of patch management.
Verifiable compliance: You fulfill the requirements of frameworks such as ISO 27001, BSI IT-Grundschutz, or the NIS 2 Directive. With a documented IT risk analysis, you hold the necessary proof required for audits and certifications.
Cost-efficiency: You invest preventatively and thereby avoid massive follow-up costs caused by security incidents, business interruptions, or data loss. This allows you to deploy your budget with maximum efficiency.
Trust: You signal to partners and customers that you take information security seriously. With a professional security concept, you solidify your position in the supply chain and gain a clear competitive advantage.
The ISO 27001 standard mandates a structured risk assessment as a central element of an ISMS. The process must be traceable, documented, and repeatable. A risk analysis according to ISO 27001 typically follows these steps:
Based on the results, suitable security measures (controls) are selected from Annex A of the standard. Important note: Annex A is a reference catalog, not a checklist. The selection of controls must always be a direct and justified response to the identified risks. A classic example of IT risk analysis according to ISO 27001 is the selection of encryption measures for sensitive data.
At the core of every risk assessment in IT is the qualification and quantification of risks based on likelihood of occurrence, frequency of occurrence, and extent of damage. Qualitative scales ranging from "very unlikely" to "very likely" and quantitative scales ranging, for example, from "0.3 times in 5 years" to "several times per month" are used for IT risk assessment.
The extent of damage is also evaluated, ranging from "negligible" to "existential threat" or in monetary tiers. The combination of both factors, visualized in a risk matrix, shows which risks have the highest priority for the IT risk assessment. To ensure consistency and traceability, the criteria for each level of the scale must be clearly defined and documented.
A medium-sized manufacturing company uses an ERP database. An IT risk analysis example could look like this:
Risk 1: Ransomware attack on the ERP system
Threat/Vulnerability: Encryption by malware via an outdated firewall.
Likelihood of occurrence: High (or frequency of occurrence: several phishing incidents in the last 12 months).
Extent of damage: Very high (production downtime).
Risk assessment: Very high risk → Immediate measures such as firewall hardening and network segmentation.
Risk 2: Outage of the test server
Threat: Hardware defect.
Likelihood of occurrence: Medium (server is 6 years old).
Extent of damage: Low (no production affected).
Risk assessment: Medium risk → Planned replacement in the next budget cycle.
This IT risk analysis example shows: Not every risk requires immediate investment. A thorough evaluation helps set priorities and deploy resources efficiently.
The BSI IT-Grundschutz (Standard 200-3) offers a practical approach to IT risk analysis. First, standard measures (basic protection) are implemented. A detailed assessment is then only carried out for areas with increased protection requirements whose risks are not already covered. The BSI distinguishes between normal, high, and very high protection requirements, with the latter requiring a comprehensive, individual risk assessment. This approach makes it easier to get started, especially for organizations that have not yet established a systematic ISMS, as it quickly leads to a solid baseline protection level.
A successful IT risk analysis follows a clear process. These best practices have proven effective in real-world application:
Interdisciplinary teams: Involve specialized departments and executive management.
Established methods: Use frameworks like ISO 27001 or BSI IT-Grundschutz.
Utilize risk catalogs: Use established catalogs as a starting point.
Document thoroughly: Record every step of the risk assessment. This is not only crucial for audits, but also preserves knowledge within the company during personnel changes.
Regular reviews: Schedule reviews at least on an annual basis.
An IT risk assessment leads to decisions on risk treatment. The four options are:
The documentation must clearly define measures, responsibilities, and deadlines. It is also important to state the reasoning behind why a specific option was chosen.
A documented risk analysis is mandatory for many regulations, including the GDPR (Art. 32), the IT Security Act 2.0, the NIS 2 Directive, or ISO 27001 certification. A professionally conducted risk analysis according to ISO 27001 forms a solid basis for meeting other requirements as well.
In addition, industry-specific regulations such as DORA in the financial sector place an increased focus on operational resilience and third-party IT risk management—challenges that cannot be managed without a sound risk analysis.
The ISMS software solutions INDITOR and i-doit Suite+ support companies in systematically conducting IT risk analyses. INDITOR® ISO and i-doit Suite+ map the requirements of ISO 27001, while INDITOR® BSI implements BSI standards 200-1 to 200-3 for IT-Grundschutz.
Starting in 2027, the i-doit Suite+ will also provide the platform for the digital successor Grundschutz++.
You are guided through the entire risk management process in a structured manner:
From identifying critical assets to evaluating likelihood of occurrence, frequency of occurrence, and extent of damage, all the way to deriving appropriate protective measures. The software thoroughly documents every step, thereby fulfilling compliance requirements for audits and certifications.
An important advantage is support for continuous risk management according to the PDCA cycle. Risk catalogs such as Annex A of ISO 27001 or BSI modules are pre-integrated and can be used directly. In this way, risk analysis evolves from a complex project into a manageable, repeatable process that measurably improves your IT security.
A sound risk analysis is a central pillar of any effective IT security strategy. It provides clarity on which threats and vulnerabilities are truly relevant, laying the foundation for targeted investments. At the same time, it reliably supports compliance with legal and regulatory requirements.
Whether conducting a risk analysis according to ISO 27001 or BSI IT-Grundschutz: The decisive factor is a systematic, continuously practiced process. The starting point is always the complete inventory of all relevant assets. This is followed by a systematic risk assessment and the selection of suitable measures. In this way, risk analysis becomes an effective management tool that demonstrably increases the security of your IT.
Would you like to targetedly reduce your IT risks? Discover how ISMS software solutions from the i-doit Group support you in structured risk management according to ISO 27001, BSI IT-Grundschutz, or other standards.