Max Date and Concatenate on separate column, Sql Server

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create table project_table ([Report_Date] datetime, [Program] varchar(3), [Project] varchar(5), [Proj_Mgr] varchar(6), [Region] varchar(4), [Proj_Use] varchar(3));
insert into project_table ([Report_Date], [Program], [Project], [Proj_Mgr], [Region], [Proj_Use])
values
    ('2017-06-04', 'pg1', 'Prj01', 'Anne', 'East', 'pu1'),
    ('2017-06-03', 'pg1', 'Prj01', 'Anne', 'East', 'pu2'),
    ('2017-06-02', 'pg1', 'Prj01', 'Anne', 'East', 'pu3'),
    ('2017-06-04', 'pg2', 'Prj02', 'Monica', 'West', 'pu4'),
    ('2017-06-03', 'pg2', 'Prj02', 'Monica', 'West', 'pu5'),
    ('2017-06-02', 'pg2', 'Prj02', 'Monica', 'West', 'pu6')
;
select
    ReportDate = convert(char(10),max(t.Report_Date),120)
  , t.Program
  , t.Project
  , t.Proj_Mgr
  , t.Region
  , [Project_Use] = stuff((
   select ',' + i.Proj_Use
   from project_table i
   where i.Program = t.Program
     and i.Project = t.Project
     and i.Proj_Mgr = t.Proj_Mgr
     and i.Region = t.Region
   for xml PATH('')
   ), 1, 1, '') 
from project_table t
group by t.Program
  , t.Project
  , t.Proj_Mgr
  , t.Region

View schema
Execution time: 0,02 sec, rows selected: 2, rows affected: 6, absolute service time: 0,17 sec