IT Risk Matrix in One Afternoon: A Simple Method
How to build an IT risk matrix for your small business in Chile in one afternoon: likelihood by impact, controls and priorities. Ask IT Lab for help.
A risk matrix is a table that lists what could go wrong, how likely it is, how much damage it would cause and what will be done about it. With a simple method it can be built in a few hours and helps decide where to invest first.
- Risk is estimated as likelihood times impact on a simple scale.
- A useful matrix is brief, has owners and is reviewed periodically.
- It serves to prioritise, not to generate paperwork.
The method
Give each risk a likelihood value and an impact value, for example from 1 to 5, and multiply them. The result orders the list: the highest is handled first. The scale must be understandable to everyone and applied consistently across rows.
Step by step for one afternoon
- Gather the right people. Management, whoever administers technology and someone from day-to-day operations.
- List critical assets. Email, business system, customer information, website, key devices.
- Note threats per asset. Examples: unauthorised access, data loss, supplier failure, human error.
- Score. Likelihood and impact, together and without lengthy debate.
- Record existing and missing controls. What protects each asset today and what is needed.
- Assign an owner and a review date. Without an owner, the matrix stays in a file.
How to use the result
The highest risks are treated with controls, transferred (for example, to a provider with contractual backing) or explicitly accepted; the latter is covered in Accepting a risk is also a decision. The matrix also shows which scenarios need an incident playbook.
What to do
- Limit the first version to the assets that sustain operations.
- Use a five-level scale and define it in writing.
- Store the matrix with a date and version.
- Review it at least yearly and whenever systems or vendors change.
- Share the results with management in business terms.
Frequently asked questions
Do I need a special tool? No; a spreadsheet is enough to begin.
Who should score the risks? A small group combining business view and technical knowledge, to reduce bias.
Does the matrix replace an audit? No. It is an internal management instrument; an audit evaluates other things.
When supporting our clients, we use the risk matrix as the basis for prioritising controls and exceptions.
IT Lab supports Chilean organisations in this. Contact us.
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