MECTS - Unified SPC Dashboard

Analysis Hub Configuration

Chart Type

Stepped vs. Straight Limits Because P-Charts and U-Charts handle subgroups with varying sample sizes (n), statistical rules require the limits (UCL/LCL) to recalculate for every single point—creating a stepped line.

Smaller samples have wider limits; larger samples have tighter limits.

Why both? For clarity, we plot the exact Stepped Limits for precision, AND an "Average Limit" (straight line based on the mean sample size) to help easily visualize the trend!

Industry Segment

Show Data Values

Simulation Engine

Sample Count (k):

Data Entry (n, defects) Paste from Excel/CSV

Process Visualization

Metrics & Knowledge Base

Statistical Verdict

SPC Concepts & CAPA Guide

Key Statistical Terms

CAPA Execution Steps (If Out of Control)

Containment: Stop the line. Quarantine the suspect batch immediately to prevent it from moving forward in the process.
Root Cause Analysis (RCA): Investigate the true cause of the variation using methods like 5 Whys or Fishbone Diagrams.
Corrective Action: Fix the immediate problem directly identified by the RCA (e.g., replace the worn tool).
Preventive Action: Implement a systemic change to prevent recurrence (e.g., update the maintenance schedule).
Verification: Monitor the SPC chart for the next 5-10 batches to mathematically prove the process has returned within the Control Limits.

Dynamic Process Diagnostics

Pattern diagnostics (such as run rule violations, trend shifts, and control limit excursions) run dynamically with your analysis data. Click "Analyze Chart Patterns" or the top action button to read full diagnostics in the interpretative overlay modal.

Data Records

Computation Ledger

Mectopedia: SPC Guide

1. What is Statistical Process Control (SPC)?

Common Cause Variation

Special Cause Variation

Control Limits vs. Specification Limits

2. The Shewhart Chart Directory

Attribute Charts (Counting Data)

Variable Charts (Continuous Data)

Live SPC Interpretation & Observations

Statistical Process Control Analytics Suite (SPC)

UNIFIED ATTRIBUTE CONTROL CHARTS