DATA ENTRY
Import data, paste spreadsheet values, or enter measurements manually
LSL:
USL:
Subgroup Size: 2
| S.G. | X1 | X2 | |
|---|---|---|---|
| 1 | |||
| 2 | |||
| 3 | |||
| 4 | |||
| 5 |
Control Limits & Statistical Parameters
X-Bar (Average) Limits
Center (CL) 0.000
Upper (UCL) 0.000
Lower (LCL) 0.000
Range (R) Limits
Center (CL) 0.000
Upper (UCL) 0.000
Lower (LCL) 0.000
CALCULATED PARAMETERS (N=2)
Grand Avg (X̄̄) 0.000
Avg Range (R̄) 0.000
Constant A2 1.880
Constants D3/D4
0.000 / 3.267
Detection Rules
In ControlX-Bar Chart
Rule 1: Beyond ±3σ (out of control)
Rule 2: 9 consecutive same side of CL
Rule 3: 6 consecutive trending
Rule 4: 14 alternating up/down
Rule 5: 2 of 3 beyond ±2σ (same side)
Rule 6: 4 of 5 beyond ±1σ
Rule 7: 15 within ±1σ (hugging)
Rule 8: 8 outside ±1σ on both sides
R Chart (Rules 1–4 recommended)
Rule 1: Beyond ±3σ (out of control)
Rule 2: 9 consecutive same side of CL
Rule 3: 6 consecutive trending
Rule 4: 14 alternating up/down
Out of control (R1) Run / trend (R2–4) Zone violation (R5–6) Stratification (R7–8) In control
CALCULATED DATA TABLE
| Subgroup | X1 | X-BAR | RANGE (R) |
|---|---|---|---|
| No data available | |||
AVERAGE (X-BAR) CHART
RANGE (R) CHART
Process Capability Analysis
NEEDS SPECSShort-Term Capability (Potential)
Cp (Spread) 0.000
Cpk (Centering) 0.000
Calculated using within-subgroup standard deviation (σ_ST). Represents the process potential if perfectly centered.
Long-Term Capability (Performance)
Pp (Spread) 0.000
Ppk (Centering) 0.000
Calculated using overall standard deviation (σ_LT). Represents the actual process performance over time.
STANDARD DEVIATIONS & COUNTS
WITHIN-SUBGROUP (σ_ST) 0.000
OVERALL DATA (σ_LT) 0.000
DATA POINTS (N) 0