sandra adele, the delivery start-up ceo, says 20% of package deliveries fail on the first attempt in urban areas, including an estimated 2 million packages that were delayed or went missing due to theft last year. that's why he co-founded doorman, to make the delivery process more convenient and secure. >> we give you a new shipping address for everything you buy online. that stuff goes to our warehouse, and then once it arrives, you can use our app to schedule a delivery from 6:00 p.m. until midnight, seven days a week, in one-hour windows. >> doorman's service costs $4 per package and is available in new york, san francisco and chicago. but it isn't the only company trying to tackle this. u.p.s. offers several services, including its access point network, which allows packages to be dropped at thousands of local businesses. fedex recently rolled out an app called delivery manager. and amazon has experimented with lockers. many companies offer tips to keep packages from getting plundered, including requiring a signature on the delivery and routing it to a location where someone can