The best way to control the amount of incoming reports is by starting in Private mode. By gradually ramping up the number of invited hackers, many of our customers are able to manage triage and validation themselves. Another tool for managing the type and volume of reports is your program's bounty reward structure. Incentivize hackers to focus on certain types of issues by offering relatively higher bounties for those issues, while you can deemphasize some issues with lower rewards.
However, if your program needs additional support with triage (temporary or ongoing), we have partnered with world class security consultancies to assist you. HackerOne’s Managed Services provide a full-service solution, including triage services and advanced tools. Contact us for more information.