SDC-i is a software suite, written in Visual Basic, designed to help assess the impact of statistical disclosure control on user analyses. This Figure illustrates the logic flow of the program suite . Each module in the suite may be run in series or used stand-alone. All are made available subject to the terms and conditions of the GNU General Public License and the inclusion of the following acknowledgement in any outputs:

"Analysis supported by use the SDC-i program suite, freely available from http://pcwww.liv.ac.uk/~william/SDC/"

Create_Aggregates     [Code]    [Manual]
Creates representative or stratified samples of input areas, if required creating new zones through the aggregation of multiple input areas. Requires a set of pre-adjustment counts as inputs.

Perturb     [Code]    [Manual]
For a given set of pre-adjustment counts, creates post-adjustment variants based on up to six pre-defined cell adjustment strategies (Random rounding to base 5 or 3; Small Cell adjustment with or without independent rounding of marginals; Barnardisation with probabilty of 0.2 or 0.04). Also , if required, calculates pre- and post-adjustment percentages based upon these counts.

SDC_Direct_Impacts     [Code]     [Manual]     [Quick Start]
Compares a set of pre- and post-adjustment cell counts from one or more tables and summarises the difference between them. Offers a wide range of optional summary measures (tabular; cellular; ranking) and methods of comparison (cell; table; cross-table; area; cross-area).