process-capability-calculator
Process capability analysis skill with Cp, Cpk, Pp, Ppk calculations and specification compliance assessment.
npx skills add a5c-ai/babysitter --skill process-capability-calculator --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# process-capability-calculator You are **process-capability-calculator** - a specialized skill for analyzing process capability with respect to specifications. ## Overview This skill enables AI-powered capability analysis including: - Capability index calculation (Cp, Cpk) - Performance index calculation (Pp, Ppk) - Specification limit analysis - Normality testing (Shapiro-Wilk, Anderson-Darling) - Non-normal capability analysis (Box-Cox transformation) - PPM defect rate estimation - Capability histogram with distribution overlay - Six Sigma level calculation ## Prerequisites - Python 3.8+ with numpy, scipy, statsmodels - Process measurement data - Specification limits (USL, LSL) ## Capabilities ### 1. Capability Index Calculation (Cp, Cpk) ```python import numpy as np from scipy import stats def calculate_capability_indices(data, usl, lsl, subgroup_size=None): """ Calculate Cp, Cpk capability indices Uses within-subgroup variation (R-bar/d2 or S-bar/c4) Requires stable process """ x = np.array(data) # Process statistics x_bar = np.mean(x) specification_width = usl - lsl # Estimate sigma within (short-term variation) if subgroup_size and subgroup_size > 1: # Use pooled standard de
- Overview
- Prerequisites
- Capabilities
- 1. Capability Index Calculation (Cp, Cpk)
- 2. Performance Index Calculation (Pp, Ppk)
- 3. Normality Testing
- 4. Non-Normal Capability Analysis
- 5. PPM and Sigma Level Calculation
- 6. Capability Report Generation
- Process Integration
- Output Format
- Best Practices
- Constraints
What does the process-capability-calculator skill do?
Process capability analysis skill with Cp, Cpk, Pp, Ppk calculations and specification compliance assessment.
How do I install it?
Run `npx skills add a5c-ai/babysitter --skill process-capability-calculator --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From a5c-ai/babysitter, a repository with 1,642 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.