PASS

1. Two-Level Designs - This program generates a 2^k factorial design for up to seven factors. It allows the design to be blocked and replicated.
   

2. Fractional Factorial Designs - This program generates two-level fractional-factorial designs of up to sixteen factors with blocking. Reports show the aliasing pattern that is used.
   

3. Balanced Incomplete Block Designs - Designs for up to ten treatments are available.
   

4. Latin Square Designs - This module generates Latin Square and Graeco-Latin Square designs. Designs for three to ten treatments are available.
   

5. Response Surface Designs - Response-surface designs are the only designs provided that allow for more than two levels. There are two general types of response-surface designs. The central-composite designs give five levels to each factor. The Box-Behnken designs give three levels to each factor.
   

6. Screening Designs - Screening designs are used to find the important factors from a large number (up to 31) of two-level factors. When the number of runs is 4, 8, 16, or 32 (powers of 2), the design is a regular fractional replication. When the number of runs is 12, 20, 24, or 28, the design used is a Plackett-Burman design.
   

7. Taguchi Designs - Taguchi (OA’s), consist of a set of fractional factorial designs which ignore interaction and concentrate on main effect estimation. This procedure generates the most popular set of Taguchi designs.
   

8. D-Optimal Designs - This procedure generates D-optimal designs for multi-factor experiments with both quantitative and qualitative factors. The factors can have a mixed number of levels. For example, you could use this procedure to design an experiment with two quantitative factors having three levels each and a qualitative factor having seven levels.
   

9. Design Generator - This program generates factorial, repeated measures, and split-plots designs with up to ten factors.
   

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System Requirements
PASS 2008, NCSS 2007, and GESS 2006 run on 32-bit and 64-bit systems with Windows 7, Vista, XP, 2000, NT, ME, 98, or 95. Requires pentium-class computer with at least 32 MB of RAM. Requires 200 MB of hard disk space. Requires Adobe Reader® version 7 or later to use the NCSS, PASS, and GESS Help Systems.

Accuracy
We at NCSS have put a great deal of effort into finding the most accurate algorithms possible. The programs have been tested and verified over and over, both by us and by our customers. Each routine has been verified against textbooks, journal articles, and, where possible, other software. NCSS is one of the most accurate statistical analysis programs available. NCSS calculates with seventeen-digit, double-precision accuracy.

Guarantee
If you are not completely satisfied with an NCSS product during the first 30 days for any reason, return the program for a full, prompt refund (excluding shipping).