QMS/9000+TM

Features and Functions

4.20 Statistical Analysis

QMS/9000+ has an analysis and reporting module that provides the statistical analyses required to operate in a quality oriented manufacturing environment. This module can be used by operating personnel, design engineers and others for both ad hoc inquires and custom reporting.

• General statistics including: average, standard deviation, lowest reading, highest reading, skewness, kurtosis, 95% confidence interval, six sigma band, Cp, Cpk, Cu, Cl
• Charts including: X-bar, R, sigma, histograms, regression analysis, scatter diagrams
• Data manipulation including algebraic/logical operations
• Outlier elimination with user-specified limits
• Rapid database search response time
• One-way ANOVA, Correlation, T test
• Keyword control/search capability including date range
• Report macros to define periodic custom reports
• Row/column export facility to other analysis routines

Graphical Capabilities

"A picture is worth a thousand words" certainly applies when trying to describe complex statistical situations in manufacturing. QMS/9000+ includes high resolution color graphics on PCs, printers and plotters.

• Charts are available for:

X                    X-Bar           X-Bar Range
Sigma                X-Bar Sigma     Tolerance
Scatter/Regression   Histogram       p, np, c, u
Pareto               Cp, Cpk, Cpu, Cpl

• High resolution graphics available for PC display and hard copy plotters
• Low resolution (text type) data plots for non-graphics terminals and printers
• Unlimited sample size for X-Bar and sigma charts
• Warning message when sample size exceeds allowable limit for X-Bar R charts
• Automatic warning when subgroup exceeds control limits
• Automatic warning for cumulative subgroups exceeding control limit
• Choice of calculated or fixed control limit
• Subgroup ID on chart
• Summary description statistics of individuals
• Chart text identification
• Moving window of last N points
• Data entry by both case and variable
• Variable and fixed sample size limits for p and np charts
• Exception reporting of out-of-control conditions

General Sampling Features

Destructive testing requires sampling to assess quality. Sampling can also be the best way to reduce appraisal costs. QMS/9000+ equips the user for both standard and non-standard sampling as well as the means to evaluate the effectiveness of any sampling plan.

• Standard sampling plans provided
• Generation of O.C. Curves for variables and attributes
• Non-standard sampling plans
• Historical / "what if" distribution of plan effectiveness
• Automatic test scheduling
• Automatic follow up/corrective action
• Complete documentation of results
• Standard and custom reports
• Resource allocation information

Sampling Test Strategies

Even when only a sample of the product is used, testing is expensive and should be done in as cost efficient a manner as possible. Testing plans may be applied to actual testing history establishing the optimum test strategy for each product and raw material.

• Variable and attribute test plans
• Automatic generation of operating characteristic curves
• Tabular listing of operating characteristic curves
• Comparison of attribute testing versus variable testing
• Past history option
• Effectiveness of testing strategy (percent defective in tested material vs. percent defective in accepted material)
• Option to include sorting of rejected lots to improve yield

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  JKA, Inc.
  
  Phone: 732.991.2256 FAX: 609.607.8527 E-mail: jka@qmsprograms.com

  copyright 1998, JKA,Inc.

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