NWA Quality Analyst Specifications
Click a link below to see any of the NWA Quality Analyst specifications
NWA Quality Analyst offers all standard SPC charts plus many special purpose charts.
Variable Control Charts
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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.”
- Scatter
- Run
- Normal Probability
- Quantile
- Box Plot
- Eight 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 nonnormal 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
- Show up to 500 defect categories
- Diagram can be ranked by cost or number of defects
- Cumulative effects can be graphically displayed
| CAM cp | CPL | Pp |
| CAM cpk | Cpm | Ppk |
| Cm | CPU | Tz |
| Cmk | CR% | Zlsl |
| Cp | “In the Box” | Zmin |
| Cpk | K | Zusl |
Includes Automotive Industry Action Group (AIAG) indices
Design any number of exception reports for each Data Set and provide a wide range of reports on SPC, specification, and pattern-rule violations.
Available for all SPC charts and process capability.
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
Multiple Linear Regression
Polynomial Regression
ANOVA (one-way)
Random Number Generator
- Integer or Real Data Values
- With orWithout 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 File 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, 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 is compatible with all major PC networks including Windows* NT* and Novell*. Runs on all 32-bit Windows platforms, including Windows 98, 2000, Me, NT, XP, and Server 2003. Compatible with Citrix and Microsoft* Terminal Services.
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