Fred Brooks: Building Student Projects That Work For Us, For Them and For Their ClientsPosted: March 3, 2012
In the Thursday keynote, Professor Brooks discussed a couple of project approaches that he thought were useful, based on his extensive experience. Once again, if you’re not in ICT, don’t switch off – I’m sure that there’s something that you can use if you want to put projects into your courses. Long-term group projects are very challenging and, while you find them everywhere, that’s no guarantee that they’re being managed properly. I’ll introduce Professor Brooks points and then finish with a brief discussion on the use of projects in the curriculum.
Firstly, Brooks described a course that you might find in a computer architecture course. The key aspect of this project is that modern computer architecture is very complex and, in many ways, fully realistic general purpose machines are well beyond the scope of time and ability that we have until very late undergraduate study. Brooks works with a special-purpose unit but this drives other requirements, as we’ll see. Fred’s guidelines for this kind of project are:
- Have milestones with early delivery.
Students must provide a detailed application description which is the most precise statement that the students can manage. A precise guess is considered better here than a vague fact, because the explicit assumption can be questioned and corrected, where handwaving may leave holes in the specification that will need to be fixed later. Students should be aware of how sensitive the application is to each assumption – this allows people to invest effort accordingly. The special-purpose nature of the architecture that they’re constructing means that the application description has to be very, very accurate or you risk building the wrong machine.
Programming Manual (End of the first month as a draft)
Another early deliverable is a programming manual – for a piece of software that hasn’t been written yet. Students are encouraged to put something specific down because, even if it’s wrong, it encourages thought and an early precision of thought.
- Then the manual is intensely critiqued – students get the chance to re-do it.
- The actual project is then handed in well before the final days of semester.
- Once again the complete project goes through a very intense critique.
- Students get the chance to incorporate the changes from the critique. Students will pay attention to the critique because it is criticism on a live document where they can act to improve their performance.
The next project described is a classic Software Engineering project – team-based software production using strong SE principles. This is a typical project found in CS at the University level but is time-intensive to manage and easy to get wrong. Fred shared his ideas on how it could be done well, based on running it over 22 years since 1966. Here are his thoughts:
- You should have real projects for real clients.
Advertise on the web for software that can be achieved by 3-5 people during a single semester, which would be useful BUT (and it’s an important BUT) you can live without. There must be the possibility that the students can fail, which means that clients have to be ready to get nothing, after having invested meeting time throughout the project.
- Teams should be 3-5, ideally 4.
With 3 people you tend to get two against one. With five, things can get too diffuse in terms of role allocation. Four is, according to Fred, just right.
- There should be lots of project choices, to allow teams choice and they can provide a selection of those that they want.
- Teams must be allowed to fail.
Not every team will fail, or needs to fail, but students need to know that it’s possible.
- Roles should be separated.
Get clear role separations and stick to them. One will look after the schedule, using the pitchfork of motivation, obtaining resources and handling management one level up. One will be chief designer of technical content. Other jobs will be split out but it should be considered a full-time job.
- Get the client requirements and get them right.
The client generally doesn’t really know what they want. You need to talk to them and refine their requirements over time. Build a prototype because it allows someone to say “That’s not what I want!” Invest time early to get these requirements right!
- Meet the teams weekly.
Weekly coaching is labour intensive and is mostly made up of listening, coaching and offering suggestions – but it takes time. Meeting each week makes something happen each week. When a student explains – they are going to have to think.
- Early deliverable to clients, with feedback.
Deadlines make things happen.
- Get something (anything) running early.
The joy of getting anything running is a spur to further success. It boosts morale and increases effort. Whatever you build can be simple but it should have built-in stubs or points where the extension to complexity can easily occur . You don’t want to have to completely reengineer at every iteration!
- Make the students present publicly.
Software Engineers have to be able to communicate what they are doing, what they have done and what they are planning to do – to their bosses, to their clients, to their staff. It’s a vital skill in the industry.
- Final grade is composed of a Team Grade (relatively easy to assess) AND an Individual Grade (harder)
Don’t multiple one by the other! If effort has been expended, some sort of mark should result. The Team Grade can come from the documentation, the presentation and an assessment of functionality – time consuming but relatively easy. The Individual Grade has to be fair to everyone and either you or the group may give a false indication of a person’s value. Have an idea of how you think everyone is going and then compare that to the group’s impression – they’ll often be the same. Fred suggested giving everyone 10 points that they allocated to everyone ELSE in the group. In his experience, these tallies usually agreed with his impression – except on the rare occasion when he had been fooled by a “mighty fast talker”
This is a pretty demanding list. How do you do tasks for people at the risk of wasting their time for six months? If failure is possible, then failure is inevitable at some stage and it’s always going to hurt to some extent. A project is going to be a deep drilling exercise and, by its nature, cannot be the only thing that students do because they’ll miss out on essential breadth. But the above suggestions will help to make sure that, when the students do go drilling, they have a reasonable chance of striking oil.