Some systems are more difficult to test than others.
Software testers contend with undefined or partially defined requirements; outdated,
incomplete, or nonexistent documentation; complex logic; a mixture of languages;
or worse. All of these factors make a system dirty, or virtually untestable.
In Testing Dirty Systems, authors William Perry and Randall Rice teach
testers a six-step process for approaching such systems, using system diagnosis
test planning test execution test analysis report
development and dirty system repair.
Because of the unknown characteristics
of the dirty system, the traditional validation of comparing actual processing
results against the expected processing results is often inadequate. Analysis
of a dirty system must go much further into describing the expected operational
characteristics of the system, including
probability of failure
based on failures during testing
expected difficulty of making changes
based on inadequacy of documentation
estimate of defects that remain
in the system
operating conditions that will lead to failures
levels based on code or test cases
complexity levels based on coding structure
Project leaders, independent testers, quality assurance personnel,
and IS auditors will benefit from this book, as well as end-users and customers
with a vested interest in the success of their systems.
From the Book
"We hope to give you a framework to build upon, not
only to test your dirty systems, but also to improve them, using the results of
To order this book by credit
card directly from Dorset House in New York, please call (800) 342-6657
or (212) 620-4053, weekdays, 9am to 6pm. Alternatively, print out our Faxable
Order Form and fax to (212) 727-1044.
purchase at a bookstore, contact our Recommended
Booksellers to verify availability.
Any store can order from Dorset House using the book's title and ISBN number.
Also, bookstores can order our books through Baker & Taylor.
like to make it easy for you to order, so please contact
us at any time for help!
DORSET HOUSE PUBLISHING CO., INC. New: 3143 Broadway, Suite 2B New
York, New York 10027 USA 1-800-DH-BOOKSor
212-620-4053, fax 212-727-1044