What will be the 3-5 Key Performance Indicators (KPIs) that would help you monitor whether the launched homeowner water filtration system business venture is on track to success? (e.g. a KPI in the hotel industry is room occupancy; in the car rental industry, a KPI is rented hours per car per day; for an advertising revenue-based website, the KPIs would include web traffic on the site and click-through rates; for a freemium subscription-based app, the KPIs might include the number of free registrations, the conversion rate to paid subscriptions but also the acquisition cost per subscription)