Default script execution order of OnBind event for a components is as below :
Component scripts in a band are executed in the sequential order in the component tree.
Scripts of composite or multiple reports are executed in the report creation order. After all scripts of one report is executed, scripts of the next report is executed.
If a component have child components (band, crosstab, table, etc.), the script execution order of child components in a parent component is slightly different from the default sequential display order. To learn more, refer to following sections about this case.