[{"constraints": [{"description": "1000 customer", "att_class": "CAPACITY"}], "obj_metric_pairs": [{"obj": "email customer and vender", "metric": {"description": "< 1 sec", "att_class": "TIME BEHAVIOR"}}, {"obj": "search for product", "metric": {"description": "< 1 sec", "att_class": "TIME BEHAVIOR"}}, {"obj": "add product to shopping cart", "metric": {"description": "2 ms", "att_class": "TIME BEHAVIOR"}}, {"obj": "restore records", "metric": {"description": "1000 rec/sec", "att_class": "SPEED"}}, {"obj": "system operation", "metric": {"description": "200 prod/sec", "att_class": "SPEED"}}, {"obj": "validate credit card", "metric": {"description": "< 2 sec", "att_class": "TIME BEHAVIOR"}}, {"obj": "acquire shipping charges", "metric": {"description": "< 2 sec", "att_class": "TIME BEHAVIOR"}}], "errors": ["missing resource"]}, {"constraints": [{"description": "?", "att_class": "?"}], "obj_metric_pairs": [{"obj": "system installation", "metric": {"description": "1 sec", "att_class": "TIME BEHAVIOR"}}], "errors": ["unquantified constraint [?]]", "missing capacity", "missing resource"]}]