Process capability indices (Minitab Capability Analysis — Normal). Within σ from R̄/d₂ (default) or S̄/c₄ when method: 's'; overall σ = sample sd.
method: 's'
Optional
Process capability indices (Minitab Capability Analysis — Normal). Within σ from R̄/d₂ (default) or S̄/c₄ when
method: 's'; overall σ = sample sd.