EffortDuration totalEffort = getTotalAvailableEffort();
EffortDuration effortAssigned = getEffortAssigned();
return new LoadPeriod(asGantt(start), asGantt(end),
totalEffort.toFormattedString(),
effortAssigned.toFormattedString(),
new LoadLevel(calculateLoadPercentage(totalEffort,
effortAssigned)));
}