请翻译鉴于收货人声称的各项产品得率消耗损失5月11日我们向收货人了解了其各项产品消耗的计量和统计方式。根据收货人介绍和现场查勘我们了解到

On May 11th, in view of the consignee's claim of yield loss in various products, we inquired about their various products and the methods of measurement and statistics of consumption. Based on the consignee's introduction and on-site investigation, we learned that... (the rest of the sentence is missing context and cannot be translated accurately)