The sentence "system should have" is correct and usable in written English.
You can use it when you are making a recommendation about an existing system or when you are discussing a hypothetical situation. For example, "We should consider revising the system so that it should have additional security features."
In addition, the readout system should have an instantaneous response time.
Still, the O.C.C.'s own risk-detection system should have been flashing red and sounding alarms, too.
The broadcaster added its internal system should have flagged up such guidance, but it had failed to do so.
As Worthington points out: "That the EU emissions trading system should have been subverted into an industrial assistance programme is not surprising but it is a great shame.
"I think that the system should have a way for an analyst to say, 'I don't have enough information to make a judgment,' " Dr. Kay said.
"More appropriately, the system should have provided for empowerment of parents, which is quite different from empowering politicians to control the patronage in the school system".
This happened even where, as in France, a majoritarian electoral system should have encouraged centre-left voters into supporting a more moderate, centrist alternative.
Another former staff member said: "The block system should have been clear before another craft is able to enter that section of the ride.
There is, though, another, more subtle reason why Obamacare seems likely to survive: it actually embodies the principles that most Americans think a health-insurance system should have.
In Pistorius's charmed life, utterly defined by exceptionalism, the justice system should have bowed to him and trundled off to hold lesser mortals accountable for their actions.
She said he had begun to use the word "mercy" among the "values he thought the criminal justice system should have, but didn't".
