Equation 20 · Part 1 · Ten Failure Modes in Agentic Coding, from Prompt Injection to False Completion

Symbol K_i

K_i=1-(1-p_i)(1-d_i)(1-c_i)(1-r_i),

K_i

What this part means

$K_i$ is part of the quantity the equation computes from the expression on the right.

Its job in the formula

$K_i$ is part of the quantity the equation computes from the expression on the right.

Full expressionSymbol K_iArticle meaning

The passage around this formula

For failure mode i , define control coverage $K_i=1-(1-p_i)(1-d_i)(1-c_i)(1-r_i)$ . where $p_i$ , $d_i$ , $c_i$ , $r_i$ are effective prevention, detection, containment, and recovery probabilities under a simplified independence assumption. The equation should not be used to manufacture precise risk numbers; controls are correlated and measurements sparse. It communicates why a single impressive guardrail cannot justify broad authority.

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Learn the underlying idea

A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.

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