Process capability analysis skill with Cp, Cpk, Pp, Ppk calculations and specification compliance assessment
Calculates process capability indices like Cp, Cpk, Pp, and Ppk to assess performance against specification limits.
npx claudepluginhub a5c-ai/babysitterThis skill is limited to using the following tools:
The Process Capability Calculator skill provides comprehensive capabilities for analyzing process capability against specification limits. It supports multiple capability indices, normality testing, and defect rate estimation for both short-term and long-term performance assessment.
skill: process-capability-calculator
inputs:
data: [10.2, 10.1, 10.3, 10.0, 10.2, 10.4, 10.3, 10.2, 10.5, 10.3]
specification_limits:
usl: 10.8
lsl: 9.2
target: 10.0
analysis_type: "short_term" # short_term | long_term
normality_test: true
outputs:
- capability_indices
- ppm_estimates
- sigma_level
- histogram_with_specs
- normality_assessment
- recommendations
Cp = (USL - LSL) / (6 * sigma_within)
Cpk = min[(USL - mean) / (3 * sigma_within), (mean - LSL) / (3 * sigma_within)]
Pp = (USL - LSL) / (6 * sigma_overall)
Ppk = min[(USL - mean) / (3 * sigma_overall), (mean - LSL) / (3 * sigma_overall)]
| Cp/Cpk Value | Interpretation | Sigma Level |
|---|---|---|
| < 0.67 | Very poor | < 2 sigma |
| 0.67 - 1.00 | Poor | 2 - 3 sigma |
| 1.00 - 1.33 | Marginal | 3 - 4 sigma |
| 1.33 - 1.67 | Good | 4 - 5 sigma |
| 1.67 - 2.00 | Very good | 5 - 6 sigma |
| > 2.00 | Excellent | > 6 sigma |
| Cpk | PPM (one-sided) | % Yield |
|---|---|---|
| 1.00 | 1,350 | 99.865% |
| 1.33 | 32 | 99.997% |
| 1.67 | 0.3 | 99.99997% |
| 2.00 | 0.001 | 99.9999999% |
Activates when the user asks about AI prompts, needs prompt templates, wants to search for prompts, or mentions prompts.chat. Use for discovering, retrieving, and improving prompts.
Search, retrieve, and install Agent Skills from the prompts.chat registry using MCP tools. Use when the user asks to find skills, browse skill catalogs, install a skill for Claude, or extend Claude's capabilities with reusable AI agent components.
This skill should be used when the user asks to "create an agent", "add an agent", "write a subagent", "agent frontmatter", "when to use description", "agent examples", "agent tools", "agent colors", "autonomous agent", or needs guidance on agent structure, system prompts, triggering conditions, or agent development best practices for Claude Code plugins.