1. NAME AND TITLE

STRADE: Stratified Random Design.

2. CONTRIBUTOR

Joint Research Centre, ISPRA, Italy, through the OECD Nuclear Energy Agency Data Bank, Gif-sur-Yvette, France.

3. CODING LANGUAGE AND COMPUTER

Fortran IV; AMDAHL or IBM.

4. NATURE OF PROBLEM SOLVED

STRADE generates matrices of experimental designs based on the Latin Hypercube Sampling technique, that can be applied to any kind of sensitivity analysis or system identification problem involving a large number of input variables. The program was developed for use in reactor safety probabilistic analyses.

5. METHOD OF SOLUTION

The range of each variable is subdivided into a number of intervals (strata) equal to the number of experiments. The probability of each variable falling within a stratum is constant. The strata are ordered into levels, and a matrix is generated so that all possible levels of each variable are taken into account with each level appearing once in a matrix column.

6. RESTRICTIONS OR LIMITATIONS

None noted.

7. TYPICAL RUNNING TIME

The sample case compiled, linked and executed in 3 CPU seconds on an IBM 3081.

8. COMPUTER HARDWARE REQUIREMENTS

The code was developed on the AMDAHL 470/V8 and tested at the NEADB on an IBM 3081.

9. COMPUTER SOFTWARE REQUIREMENTS

The VS Fortran compiler under MVS/SP was used on the IBM 3081 to execute the sample case.

10. REFERENCE

A. Amendola and B. Lisanti, "STRADE (Stratified Random Design): Description and How to Use, EUROCOPI No. 14" (December 1981).

11. CONTENTS OF CODE PACKAGE

Included are the referenced document and one (1.2MB) DOS diskette which contains the source code plus sample problem input and output.

12. DATE OF ABSTRACT

August 1988.