Rc Coleman Case Study

Case study 3 - R.C Coleman

Activity | Immediate Predecessor | Optimistic (a) | Time most probable (m) | Pessimistic (b) |

ABCDEFGHIJK | ----A, BCCECD, F, GD, FHI, J | 46287444432 | 6841010666644 | 8166241382081456 |

1. Calculate expected time (activity’s mean completion) and variance

Activity | Expected time: t = (a + 4m + b)/6 | Variance = ((b-a)/6)2 |

A | 6 | 0.444 |

B | 9 | 2.778 |

C | 4 | 0.444 |

D | 12 | 7.111 |

E | 10 | 1.000 |

F | 6 | 0.444 |

G | 8 | 7.111 |

H | 6 | 0.444 |

I | 7 | 2.778 |

J | 4 | 0.111 |

K | 4 | 0.444 |

R.C Coleman’s project networFinish

I

K

J

H

G

D

F

E

C

B

A

Start

k

Activity | Earliest start | Earliest finish | Latest start | Latest finish | Slack | Critical activity |

A | 0 | 6 | 3 | 9 | 3 | |

B | 0 | 9 | 0 | 9 | 0 | Yes |

C | 9 | 13 | 9 | 13 | 0 | Yes |

D | 13 | 25 | 17 | 29 | 4 | |

E | 13 | 23 | 13 | 23 | 0 | Yes |

F | 23 | 29 | 23 | 29 | 0 | Yes |

G | 13 | 21 | 21 | 29 | 8 | |

H | 29 | 35 | 29 | 35 | 0 | Yes |...