Service trust chain

Abstract

At least one computer-readable medium on which are stored instructions that, when executed by one or more processing devices, enable the one or more processing devices to perform a method. The method includes the steps of providing over a network a request for first information from a second service provider at a job site characterizing a first service provided by a first service provider at the job site, receiving over the network from the second service provider the first information, providing over the network a request for second information from a third service provider at the job site characterizing a second service provided by the second service provider at the job site, and receiving over the network from the third service provider the second information.

What is claimed is: 
     
         1 . At least one computer-readable medium on which are stored instructions that, when executed by one or more processing devices, enable the one or more processing devices to perform a method, the method comprising the steps of:
 providing over a network a request for first information from a second service provider at a job site characterizing a first service provided by a first service provider at the job site;   receiving over the network from the second service provider the first information;   providing over the network a request for second information from a third service provider at the job site characterizing a second service provided by the second service provider at the job site; and   receiving over the network from the third service provider the second information.   
     
     
         2 . The medium of  claim 1 , wherein the request for first information comprises one or more requests to characterize the provided first service. 
     
     
         3 . The medium of  claim 1 , wherein the request for second information comprises one or more requests to characterize the provided second service. 
     
     
         4 . The medium of  claim 2 , further comprising selecting the one or more requests based on a reference code identifying the first service. 
     
     
         5 . The medium of  claim 3 , further comprising selecting the one or more requests based on a reference code identifying the second service. 
     
     
         6 . The medium of  claim 1 , wherein the first information comprises one or more photographs of the job site. 
     
     
         7 . The medium of  claim 1 , wherein the second information comprises one or more photographs of the job site. 
     
     
         8 . The medium of  claim 1 , further comprising comparing the first information with previously received information characterizing the first service. 
     
     
         9 . The medium of  claim 1 , further comprising comparing the second information with previously received information characterizing the second service.