If you want to evaluate the amount of effort that ClearCheck can save in development costs, here are some articles that will help you decide.
ClearCheck is based on the best practices for ClearCase published by the experts at IBM. The materials below will give you an idea of some of the knowledge that went into building ClearCheck.
Mark Zukowsky, Caring for Your Rational ClearCase VOBs: http://www.ibm.com/developerworks/rational/library/2786.html
An introductory article that explains the various types of problems that may arise in VOBs, how to identify and how to correct them. ClearCheck includes all the checks recommended in the article that do not require human intervention (read-only checks).
When good VOBs go bad: http://www.ibm.com/developerworks/rational/library/4205.html
An advanced course for IBM® Rational® ClearCase® administrators, teaching how to identify, prevent, and resolve VOB database problems, with case studies for practice. All the checks and practices recommended by this article are performed automatically by ClearCheck.
About the ClearCase database utility dbcheck: http://www-01.ibm.com/support/docview.wss?rs=0&uid=swg21203130
A short introduction to the utility
Running the ClearCase dbcheck utility: http://www-01.ibm.com/support/docview.wss?rs=984&uid=swg21122748
A detailed guide to using dbcheck on Windows and Unix
Carem Bennett, dbcheck VOB database Troubleshooting: http://www.ibm.com/developerworks/rational/library/content/03July/getstart/CC/troubleshooting.pdf
A guide to dbcheck listing all error messages and the information necessary before you contact IBM for support.
IBM Documentation of checkvob: http://publib.boulder.ibm.com/infocenter/cchelp/v7r0m1/index.jsp?topic=/com.ibm.rational.clearcase.cc_admin.doc/topics/c_maint_checkvob.htm
Short introduction to checkvob with links for using the utility to fix various problems.
Checkvob Reference: http://publib.boulder.ibm.com/infocenter/cchelp/v7r0m0/index.jsp?topic=/com.ibm.rational.clearcase.cc_ref.doc/topics/ct_checkvob.htm
The complete checkvob reference
Checking for VOB Free Space and Preventing Corruption
VOB database corruption can occur if databases are stored on a Network Attached Storage device and the NAS runs out of disk space: http://www-01.ibm.com/support/docview.wss?ratlid=cctocbody&rs=984&uid=swg21220099
Documentation of the problem and how to resolve it.
rgy_check Reference: http://publib.boulder.ibm.com/infocenter/cchelp/v7r0m0/index.jsp?topic=/com.ibm.rational.clearcase.cc_ref.doc/topics/rgy_check.htm
The complete rgy_check reference