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Functional Specifications

NWA Quality Analyst®

NWA Quality Analyst is an award winning SPC Charting and analysis software solution with all of the standard control charts and a whole host of additional functionality available to make data-driven decisions from the production floor to the front office. 

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
  • SPC and Process Capability charts track specifications that change over time
  • 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

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

Pareto Analysis

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

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.

Multivariate Analysis (add-on module)

Create PCA (Principal Components Analysis) and PLS (Partial Least Squares) models using Sartorius SIMCA and Infometrix Pirouette and add them to Quality Analyst Data Sets for computation and charting.

  • Hotelling’s T2 and SPC charts from PCA models
  • Automatically calculated prediction Variables from PLS models

Stability Analysis (add-on module)

Meets FDA Q1E Guidance for Stability Analysis and Shelf-life Prediction combining results from multiple production lots using ANCOVA analysis and trend charting.

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
  • 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 MS Office data sources (Access and Excel)

ODBC connection to all major databases

Connectivity definitions can be created using a user-friendly step-wise wizard, including denormalization and data filtering.  Also supports user-defined SQL.


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 one or more SPC chart points. Output includes chart call-outs, Text and Pareto reports.



NWA Quality Analyst 7 Trial