public double getAvgExecutionTime() {
    double sumExecutionTime = 0;
    int count = 0;

    for (Story story : this.getSuccessfulStories()) {
      for (SingleTest test : story.getTests()) {
        sumExecutionTime += Double.valueOf(test.getExecutiontime());
        count++;
      }
    }

    for (Story story : this.getFailedStories()) {
      for (SingleTest test : story.getTests()) {
        sumExecutionTime += Double.valueOf(test.getExecutiontime());
        count++;
      }
    }

    for (Story story : this.getIncompleteStories()) {
      for (SingleTest test : story.getTests()) {
        sumExecutionTime += Double.valueOf(test.getExecutiontime());
        count++;
      }
    }

    return MathHelper.floor(sumExecutionTime / count, 2);
  }