http://www.bbc.co.uk/news/world-asia-pacific-110696161. Determination
The first officers who tried to storm the bus were driven out by gunshots from the hostage taker, former policeman Rolando Mendoza. "They showed great courage to go on board. It's very crowded, just one aisle down the middle of the bus. But once you get on board it's not unexpected you are going to be fired at. Squads like this have to be made up of very special people, specially trained and selected for their characteristics of courage, determination and aggression. In this case they acted as 99% of the population would have, which was to turn round and get out. They didn't seem to have the necessary determination and aggression to follow the attack through."
2. Lack of equipment
The police spent a long time smashing the windows of the bus, whereas explosive charges (known as frame charges) would have knocked in windows and doors instantly. "They had no ladders to get through the windows. They smashed the windows but didn't know what to do next," Mr Shoebridge says. "They almost looked like a group of vandals." Their firearms were also inappropriate - some had pistols, some had assault rifles. Ideally they would have carried a short submachine gun, suitable for use in confined spaces.
5. Satisfying the gunman's demands
"I wondered why the authorities just didn't give in to all of his demands," says Charles Shoebridge. "A promise extracted under force is not a promise that you are required to honour. Nobody wants to give in to the demands of terrorists, but in a situation like this, which did not involve a terrorist group, or release of prisoners, they could have just accepted his demands. He could be reinstated in the police - and then be immediately put in prison for life for hostage taking." The Philippines authorities did in fact give in to the gunman's demands, but too little, too late. One message promised to review his case, while he wanted it formally dismissed. A second message reinstating him as a police offer only arrived after the shooting had started.
6. Televised proceedings
The gunman was able to follow events on television, revealing to him everything that was going on around him. This was a "crucial defect in the police handling", Mr Shoebridge says. He adds that police should always consider putting a barrier or screen around the area, to shield the scene from the cameras and keep the hostage taker in the dark.