2. Do You Need To Run 24/7? So How Do You Do System Maintenance? “Spiral Development” With Advanced Traffic Control, Inc.

3. Needed: A Development Strategy That Accounts For Errors Maintenance changes to software that aren’t perfect the first time Device replacements with newer versions that don’t run with the old drivers “Service Packs” that do more harm than good. Software upgrades that won’t read old files.

4. You’re Going To Need More Than One System. These errors will cause downtime, because even a system reboot causes significant downtime. These errors will cause an indeterminate amount of downtime.

5. The Problem With Hardware Fault Tolerance Updates to hardware fault tolerant systems by definition effect the entire configuration. The entire configuration looks like a single computer, so a “Blue Screen Of Death” is still a fatal system error.

6. Spiral Development Original System Backup Modified System Backup Modified System Tested New Version A Original System As Backup Backup Updated To New Version Modified System Backup Modified System Tested Version A System As Backup Upon Failure Controlled Fail o ver Controlled Failover

7. Want To Know More? Write or Visit Us: Advanced Traffic Control, Inc. 4811 Lyons Technology Parkway #7 Coconut Creek, Florida, 33073 Call Us Telephone: (954) 428-9100 Toll-Free 1-866-242-4487 [866-atc4its] Check our web site www.atc4its.com Email Us. info@atc4its.com