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<title>2-Les_etapes_de_la_gpi</title></head><body><article class="markdown-body"><h1>
<a id="user-content-les-étapes-de-la-gestion-de-projet-informatique" class="anchor" href="#les-%C3%A9tapes-de-la-gestion-de-projet-informatique" aria-hidden="true"><span class="octicon octicon-link"></span></a>Les étapes de la gestion de projet informatique</h1>
<h2>
<a id="user-content-Étapes" class="anchor" href="#%C3%89tapes" aria-hidden="true"><span class="octicon octicon-link"></span></a>Étapes</h2>
<ol>
<li>Estimation de la charge</li>
<li>Signature du contrat
<ul>
<li>Étude détaillée de la charge => Méhode analytique</li>
<li>Délai minimal techniquement nécessaire => Méthode PERT
<ul>
<li>Délai opérationnel</li>
<li>Nb de collaborateurs à prévoir = $\frac{\textrm{Charge estimée}}{\textrm{Délai opérationnel}}$</li>
</ul>
</li>
</ul>
</li>
<li>En fonction du calendrier des personnels, on décide qui fait quoi (affectation)</li>
<li>On construit un planning, ou calendrier de réalisation, ou diagramme de GANTT</li>
<li>Pilotage du projet
<ul>
<li>Suivi de l'avancement</li>
<li>Gestion des aléas</li>
</ul>
</li>
</ol>
<h2>
<a id="user-content-signature-du-contrat" class="anchor" href="#signature-du-contrat" aria-hidden="true"><span class="octicon octicon-link"></span></a>Signature du contrat</h2>
<p>Le contrat va être signé, on procède à l'analyse détaillée de la durée.</p>
<h3>
<a id="user-content-niveaux-de-démarrage" class="anchor" href="#niveaux-de-d%C3%A9marrage" aria-hidden="true"><span class="octicon octicon-link"></span></a>Niveaux de démarrage</h3>
<table>
<thead>
<tr>
<th>Tâches ancêtres</th>
<th>Tâches</th>
<th>1</th>
<th>2</th>
<th>3</th>
<th>4</th>
<th>5</th>
<th>6</th>
<th>7</th>
</tr>
</thead>
<tbody>
<tr>
<td>-</td>
<td>A</td>
<td>A</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>A</td>
<td>B</td>
<td></td>
<td>B</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>B</td>
<td>C</td>
<td></td>
<td></td>
<td>C</td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>C</td>
<td>D</td>
<td></td>
<td></td>
<td></td>
<td>D</td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>D, F</td>
<td>E</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td>E</td>
<td></td>
<td></td>
</tr>
<tr>
<td>C</td>
<td>F</td>
<td></td>
<td></td>
<td></td>
<td>F</td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>B</td>
<td>G</td>
<td></td>
<td></td>
<td>G</td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>G</td>
<td>H</td>
<td></td>
<td></td>
<td></td>
<td>H</td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>H, F</td>
<td>I</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td>I</td>
<td></td>
<td></td>
</tr>
<tr>
<td>I, E</td>
<td>J</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td>J</td>
<td></td>
</tr>
<tr>
<td>J, M</td>
<td>K</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td>K</td>
</tr>
<tr>
<td>-</td>
<td>L</td>
<td>L</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td>L, H</td>
<td>M</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td>M</td>
<td></td>
<td></td>
</tr>
</tbody>
</table>
<h3>
<a id="user-content-méthode-pert" class="anchor" href="#m%C3%A9thode-pert" aria-hidden="true"><span class="octicon octicon-link"></span></a>Méthode PERT</h3>
<p>On calcule le délai minimum techniquement nécessaire à condition de disposer de toutes les ressources nécessaires.</p>
<p><em>(cf. scan)</em></p>
<p>On peut calculer la marge dont dispose chaque tâche.<br>
La séquence des tâches sans marge s'appelle le <strong>chemin critique</strong>.</p>
<p>Remarques :</p>
<ul>
<li>On ne doit pas s'entendre avec le client sur le délai <em>fin au plus tôt</em>
<ol>
<li>Pour pallier les inévitables aléas.</li>
<li>Pour lisser la charge des ressources utilisées => Allongement du délai nécessaire.</li>
</ol>
</li>
</ul>
<h2>
<a id="user-content-diagramme-de-gantt" class="anchor" href="#diagramme-de-gantt" aria-hidden="true"><span class="octicon octicon-link"></span></a>Diagramme de GANTT</h2>
<p><em>(Tu sais faire, je vais pas te le dessiner)</em></p>
<h2>
<a id="user-content-pilotage-de-projet" class="anchor" href="#pilotage-de-projet" aria-hidden="true"><span class="octicon octicon-link"></span></a>Pilotage de projet</h2>
<p>On arrive à une répartition 54.5 pour Claude contre 71 pour Camille.<br>
<strong>Problème</strong> : On ne connaît pas assez Claude pour savoir quel est son coefficient de productivité.<br>
$$\textrm{Coefficient de productivite} = \frac{\textrm{avancement}}{\textrm{temps passe}}$$
$$\textrm{charge affectee} = \frac{\textrm{charge initiale}}{\textrm{coeff de prod}}$$</p>
<p>On passe alors de la charge initiale à la charge affectée qui est une charge "personnalisée".</p>
<h2>
<a id="user-content-différents-indicateurs" class="anchor" href="#diff%C3%A9rents-indicateurs" aria-hidden="true"><span class="octicon octicon-link"></span></a>Différents indicateurs</h2>
<h3>
<a id="user-content-coefficient-de-productivité" class="anchor" href="#coefficient-de-productivit%C3%A9" aria-hidden="true"><span class="octicon octicon-link"></span></a>Coefficient de productivité</h3>
<p>$$\frac{\textrm{avancement}}{\textrm{temps passe}}$$</p>
<h3>
<a id="user-content-coefficient-de-performance" class="anchor" href="#coefficient-de-performance" aria-hidden="true"><span class="octicon octicon-link"></span></a>Coefficient de performance</h3>
<p>$$\frac{\textrm{charge affectee}}{\textrm{temps passe} + \textrm{reste a faire}}$$</p>
<h3>
<a id="user-content-coefficient-dutilisation-du-temps" class="anchor" href="#coefficient-dutilisation-du-temps" aria-hidden="true"><span class="octicon octicon-link"></span></a>Coefficient d'utilisation du temps</h3>
<p>$$\frac{\textrm{temps passe}}{\textrm{temps disponible}}$$</p>
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