Functional Specifications
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.