Running Cron -- same time jobs

Hi
Is it possible to run different cron jobs at the same time? It appears that when I run ones at 15 min granularity that they may prevent ones running later in the day.
Should crons run at same time have impact on one another?

You can run concurrent cron jobs for same user and other users same time same date no problem at all
I see no problem running multiple cron jobs simultaneously . also you can post /var/adm/cron/log output here for diagnosis

Tks, however i have no cron dir in /var/adm.
Im running SunOS alps 5.10 Generic_125100-05 sun4v sparc SUNW,Sun-Fire-T200

Cron log on Solaris is located under /var/cron.

thanks--got it. so if there is any conflict or cron cant run it will log it in /var/cron/log ??. WHats difference between the ">" & "<" symbols?