GANTT : Bug on start date calculation when previous task is over an off day

0 votes
asked Oct 14 in Bug by Gabriel (160 points)

As Draw are better then text I will display here the bug : (click on the image to display the plantuml code)

And here the expected Gantt:

Am I doing something wrong ?

Or is it a bug ?

Regards

commented Oct 14 by The-Lu (36,240 points)

Here is a minimal example here (For PlantUML team):

@startuml
title Planning des ressources
language fr
project starts 2021/10/18
printscale daily zoom 2
saturday are closed
sunday are closed

     [Task n°1] on {Res:100%} lasts 4 days
then [Task n°2] on {Res:100%} lasts 4 days

' Res est au 4/5ieme
{Res} is off on 2021-10-20
{Res} is off on 2021-10-27
@enduml

Regards.

1 Answer

0 votes
answered Oct 14 by The-Lu (36,240 points)

Hello G.,

In fact, you must declare all the constraints first, and then the task flow...

Here is a good declaration:

@startuml
title Planning des ressources
language fr
project starts 2021/10/18
printscale daily zoom 2
saturday are closed
sunday are closed
2021-11-01 are closed
2021-11-11 are closed

' Jours fériers
{Res} is off on 2021-11-01
{Res} is off on 2021-11-11
' Res est au 4/5ieme
{Res} is off on 2021-10-20
{Res} is off on 2021-10-27
{Res} is off on 2021-11-03
{Res} is off on 2021-11-10
{Res} is off on 2021-11-17
{Res} is off on 2021-11-24

' Ensuite les tâches...
     [Task n°1] on {Res:100%} lasts 4 days
then [Task n°2] on {Res:100%} lasts 4 days
then [Task n°3] on {Res:100%} lasts 4 days
then [Task n°4] on {Res:50%}  lasts 4 days
then [Task n°5] on {Res:25%}  lasts 2 days
@enduml

Then, we observe the expected result:

See also doc. on PlantUML Gantt help page.

If that can help,
Regards,
Th.

commented Oct 15 by Gabriel (160 points)
Many thanks for your answer
...