Para manter a confiança do cliente durante falhas no sistema, aja rapidamente com transparência, comunicando o problema e as soluções em andamento. Implemente planos de contingência, garanta suporte contínuo e priorize a resolução ágil. Após a correção, ofereça medidas preventivas e demonstre compromisso com a melhoria para evitar futuras interrupções.

It is very important to have business continuity plan (BCP) , if primary system crashes then we need inform the client immediately saying it will be recovered within agreed recovery timeline ( service level agreement) and in parallel initiate BCP to switch the applications to secondary system to ensure recovery done with SLA provided to clients . Also , we need to ensure clients applications restored within the agreed timelines. This strategy will ensure client trust remain even though there is system down due to crash.

Inform clients about the issue as soon as possible. Provide alternative options or compensations for the inconvenience caused. Keep clients in the loop with progress and expected resolution times.

Inform abt the issue. Update client abt the issue and provide an alternative if possible. Work proactively on the issues and provide timely update to client

You don't tell your clients. You just switch operations to back-up systems and then you slowly investigate and fix the affected systems. Just make sure you haven't lost any data.