NWA Quality Analyst®

Control Charts

• NWA Quality Analyst offers all standard SPC charts plus many special purpose charts.

Variable Control Charts

• X-bar (Mean)
• Range
• X-bar and Range
• Standard Deviation
• X-bar and Standard Deviation
• Individual Measurements
• Individual and Range
• Moving Average
• Moving Range
• Median
• Median/Individual
• Cumulative Sum (CUSUM)
• Exponentially Weighted Moving Average (EWMA)

Attribute Control Charts

• Percent Defective (p)
• Number Defective (np)
• Defects (c)
• Defects per Unit (u)

Chart Customization

• Calculate control limits automatically or enter them manually
• Automatically adjust control limits for changing subgroup size
• Create subgroups with up to 99 measurements
• Select from among five ways to handle missing data
• Derive control limits by any of three methods, including exact probability limits
• Choose up to three user-defined, independently calculated sets of control limits
• Select from four methods of calculating sigma
• Define up to 23 custom pattern rules; Western Electric rules are the default
• Shift control limits to show up to 99 process shifts per chart
• Background colors can be defined for up to three chart zones to create "Rainbow Charts"

Other Charts

• Scatter
• Run
• Normal Probability
• Quantile
• Box Plot

Process Capability Analysis

• Distribution types:
  • Normal
  • Skewness and Kurtosis Adjusted (Johnson)
  • Two Parameter Log Normal
  • Three Parameter Log Normal
  • Truncated Normal
  • Folded Normal
  • Weibull
  • Rayleigh
• Capability indices can be adjusted for non-normal distributions
• Bilateral and Unilateral specifications supported
• Select the indices and statistics to report
• Confidence bounds provided for capability indices
• Set histogram bars and scale automatically or manually
• Multiple variable process capability reports
• Box plots

Pareto Analysis

• Show up to 500 defect categories
• Diagram can be ranked by cost or number of defects
• Cumulative effects can be graphically displayed

Capability Indices

• CAM cp
• CAM cpk
• Cm
• Cmk
• Cp
• Cpk
• CPL
• Cpm
• CPU
• CR%
• "In the Box"
• K
• Pp
• Ppk
• Tz
• Zlsl
• Zmin
• Zusl

• Includes Automotive Industry Action Group (AIAG) indices

Exception Reporting

• Design any number of exception reports for each Data Set and provide a wide range of reports on SPC, specification, and pattern-rule violations.

Short Run Analysis

• Available for all SPC charts and process capability analysis.

Additional Data Analysis

• Descriptive Statistics
  • Mean
  • Standard Deviation
  • Coefficient of Variation
  • Standard Error
  • Skewness
  • Kurtosis
  • Moments about the Mean
• Means (t) Tests
  • Single Sample t-test
  • Unpaired Sample t-test
  • Paired Sample t-test
  • Pearson Product Moment Correlation
• Chi-square Analysis
  • Bartlett's Chi-Square
  • Difference Among Proportions
  • Equal Expected Frequencies
  • Unequal Expected Frequencies
• Weibull (Reliability Analysis)
  • Full or Censored Data
  • Maximum Likelihood and Rank Regression
  • Methods
  • Includes Exponential Distribution
• Non-parametrics
  • Kruskal-Wallis
  • Wald-Wolfowitz Runs Test
• Correlation
  • Analyze up to 50 variables simultaneously.
• Single Variable Regression/Curve Fitting
  • Linear
  • Power
  • Exponential
  • Logarithmic
  • Stability Analysis (add-on module)
• Multiple Linear Regression
• Polynomial Regression
• ANOVA (one-way)
• Random Number Generator
  • Integer or Real Data Values
  • With or Without Replacement
  • Uniform or Normally Distributed Data

Data Entry and Management

• Complete data file creation and maintenance capability, including:
  • Variable Definition
  • Variable Type
  • Format Control
  • Target and Specification Values
  • Data-Entry Masks
• Data Table Structure
  • Data tables can be up to 500 characteristics by 999,999 rows.
• Database Connectivity
  • Direct connectivity to Access and Excel
  • ODBC connection to all major databases
  • Supports user-defined SQL
  • Interface to Wonderware IndustrialSQL Server

Output

• Integrated text and graphics display, user-defined layouts, JPG, PNG, BMP, WMF, GIF, PCX and XML.

Assignable Cause/Corrective Action

• Predefined Cause and Action text and comments up to 65 characters assigned to any SPC point. Text and Pareto reporting.

System Requirements

NWA Quality Analyst runs on Microsoft Windows® XP SP2 or newer, including 64-bit Windows 7 and Windows 8.  Compatible with Citrix and Micro­soft Terminal Services, and other Windows-compliant thin-client environments.