List<SOM_QuoteLineSurvey__c> surveys = [select id from SOM_QuoteLineSurvey__c];
for (SOM_QuoteLineSurvey__c s : surveys) {
    s.Status__c = 'Not sent';
}

update surveys;

System.schedule('Report Provisioning Job', '0 25 * * * ?', new SOM_ReportSenderJobScheduler());