Building an extension
Question
Make a precedence table showing the constraints for building an extension.
| Activity | |
| A | Get planning permission |
| B | Build the foundations |
| C | Build the walls |
| D | Put in windows and doors |
| E | Build the roof |
| F | Put in electrics |
| G | Put in plumbing |
| H | Decorating |
| Activity | A |
|---|---|
| Get planning permission |
| Activity | B |
|---|---|
| Build the foundations |
| Activity | C |
|---|---|
| Build the walls |
| Activity | D |
|---|---|
| Put in windows and doors |
| Activity | E |
|---|---|
| Build the roof |
| Activity | F |
|---|---|
| Put in electrics |
| Activity | G |
|---|---|
| Put in plumbing |
| Activity | H |
|---|---|
| Decorating |
The constraints are:
- B depends on A
- C depends on B
- D and E depend on C
- F and G depend on E
- H depends on F and G
| Activity | Depends on |
| A | |
| B | A |
| C | B |
| D | C |
| E | C |
| F | E |
| G | E |
| H | F and G |
| Activity | A |
|---|---|
| Depends on |
| Activity | B |
|---|---|
| Depends on | A |
| Activity | C |
|---|---|
| Depends on | B |
| Activity | D |
|---|---|
| Depends on | C |
| Activity | E |
|---|---|
| Depends on | C |
| Activity | F |
|---|---|
| Depends on | E |
| Activity | G |
|---|---|
| Depends on | E |
| Activity | H |
|---|---|
| Depends on | F and G |