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The CISO Decision Brief

If…, then how…

If a metric informs no decision, then do we keep reporting it?

5 decision pointsThe pack behind this answer: Cybersecurity Metrics & Reporting Programme

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The short answer

Recommendation
No. Retire a metric that changed or confirmed no decision in the last 12 months, keep its definition with the date and the reason, and replace it only if it pointed at a real need. A measure the board agreed to see, or one that feeds it, is dropped through the board's own yearly review of its reporting.
Reasoning
A metric exists for a decision. If nobody would decide anything differently when the number moves, it is not collected, however interesting it is or however well it is run. Every extra number competes for the same attention, and a set where metrics are only ever added has no review at all. The first review question decides on its own: a metric that informed no decision is retired, whatever else it does well. A metric that does inform a decision is kept, and fixed where it falls short, including by moving it to the audience that takes the decision.
Considerations
  • The six review questions and the 12-month window are the defaults in the CISO Times metrics pack. Your own method may set a different window.
  • Answer no if you are unsure. A no is a prompt to look, not a verdict.
  • The body that agreed the board's measures depends on governance: the board or a committee it delegates to, the management board in a two-tier structure, or executive management with no board. Changing that set is for that body. If unsure a metric feeds it, assume it does.
  • A replacement gets its own definition and a new identifier. It is never the old metric renamed, because the identifier is how its history is found.

The decision, step by step

Select any step for the reasoning behind it and where the pack covers it.

  • Start
  • Step
  • Decision
  • Outcome

Keyboard: Tab to a step, arrow keys move along the flow, Enter pins its explanation, + and − zoom, 0 fits the diagram, Esc closes. The text version below has the same content.

Where a step quotes a number, it is the default in the CISO Times pack. Your own standard may set a different one.

Read as text

The same flow written out: each step, its reasoning and where the pack covers it. 14 steps.
  1. Start

    A metric is reported, but nobody acts on it

    A metric exists for a decision. If nobody would decide anything differently when the number moves, it is not collected: interesting is not enough. At board level every extra number competes for the same few minutes of attention, and a programme where metrics are only ever added has no review at all.

    In the pack

  2. Step

    Ask what anyone would do differently if it moved

    Write the decision as something a named person does: fund, reassess, escalate, change a plan, accept. 'Awareness' or 'visibility' is not a decision. Vanity metrics, such as attacks blocked, look impressive and always move the right way, but no decision changes because of them.

    In the pack

  3. Decision

    Did it change or confirm a decision in the last 12 months?

    This is the first of six review questions, and it decides on its own. A metric that informed no decision in the pack's default window of 12 months is retired, whatever else it does well. If you are unsure, answer no: a no is a prompt to look, not a verdict.

    In the pack

  4. Decision

    Does it reach the deciding audience, at that audience's cadence?

    Every metric in use goes to the security and IT leadership team. It reaches the executive committee only if the committee decides on it, and the board only through the board measures the board agreed. The pack's default cadences are monthly for the leadership team and the executive committee, and quarterly for the board.

    In the pack

  5. Outcome

    Move it to the audience that decides on it

    The metric informs a decision, so it is kept and fixed: it is shown to the wrong audience. Report it to the audience that takes the decision, at that audience's cadence, and change the audience and cadence on its definition. Close any other gaps the review questions find before its next report.

    In the pack

  6. Decision

    Are the remaining review questions all answered yes?

    Does it have an approved definition, used unchanged by every report that shows it? Did its inputs pass the quality checks in each of the last three periods? Does it have a target, or thresholds tied to appetite? Does it have one owner and one supplier per input, other than the validator? Answer no if you are unsure.

    In the pack

  7. Outcome

    Keep it, and review it again within a year

    Every answer is yes, so the metric stays as it is. Review it again against the same six questions within 12 months, and set that date on its definition.

    In the pack

  8. Outcome

    Fix the gaps before its next report

    A metric that informs a decision but fails another question is kept and fixed. Close each gap before the next period. Moving to a catalogue metric that answers the same question, with its own definition, is one way to fix it: in the pack's example, 'access reviews completed' became 'removals confirmed on time'.

    In the pack

  9. Decision

    Is it, or does it feed, a measure the board agreed to see?

    The board agreed its selection of measures, with their targets and tolerances. Depending on how you are governed, that is the board or a committee it delegated to, the management board in a two-tier structure, or executive management where there is no board. The definition says which board measure a metric feeds. Because that body agreed the selection, changing it is for that body, through its yearly review. If you do not know, treat it as a board measure.

    In the pack

  10. Outcome

    Propose dropping it at the board's yearly reporting review

    Once a year the board's reporting is reviewed, and measures the board no longer asks about are dropped. Put the measure forward there, with the reason it informs no decision and any better measure for the same question.

    In the pack

  11. Step

    Stop collecting it at the next reporting period

    Retire it: stop collecting and reporting it, mark its definition Retired with the date and the reason, and keep the definition. If anyone proposes the metric again, the kept definition shows why it was dropped.

    In the pack

  12. Decision

    Did it point at a real need that a better metric could serve?

    Some dropped metrics were a poor answer to a real question. In the pack's example, 'backup jobs completed successfully' informed no decision, but whether critical systems can be restored does. Where that is so, a better metric for the same decision can replace the old one.

    In the pack

  13. Outcome

    Replace it with a new metric, with its own definition

    The replacement gets a new definition and a new identifier. It is never the old metric renamed, because a metric's identifier is how its history is found. Write its definition before its first value is reported.

    In the pack

  14. Outcome

    Dropped, with its definition and reason kept

    The metric leaves every report, and its definition is kept with the date and the reason. Fewer, better metrics: the set should grow only as fast as it is pruned. The pack's guidance is that most organisations reviewing an existing set drop a third of what they report.

Practical checklist

  1. Write down what anyone would do differently if the metric moved, as something a named person does.
  2. Ask whether it changed or confirmed a decision in the last 12 months.
  3. If it did, check it reaches the audience that takes the decision, at that audience's cadence, and move it if not.
  4. Check the other review questions: an approved definition used unchanged, clean quality checks for three periods, a target or thresholds, and an owner and suppliers other than the validator. Fix any gap.
  5. If it informed no decision and is, or feeds, a board measure, propose dropping it at the board's yearly reporting review.
  6. Otherwise, stop collecting it at the next reporting period, and mark its definition Retired with the date and the reason.
  7. If it pointed at a real need, write a new metric for the same decision, with its own definition, before its first value is reported.

Evidence to have ready

  • The yearly review of each metric against the six questions, with the outcome: keep, fix or drop.
  • Retired definitions kept with the date and the reason.
  • For any board measure, the board's yearly reporting review and its decision.
  • The definition of any replacement metric, with its new identifier.

Assumptions

  • The metric is reported today to at least one audience: the security and IT leadership team, the executive committee or the board.
  • The six review questions and the 12-month window are the defaults in the CISO Times metrics pack. Your own method may set a different window.

Not covered here