Working over each other
Finds crews from different contractors scheduled in the same area at the same time where one is above the other (6 ft or more apart) or under a crane lift, then re-sequences them using float so the project finish does not move. Each fix is a safety tie: one crew finishes before the other starts in that area.
Stacked crews now calc
6
one above the other or under a lift
Source: activity
Can fix with float calc
3
safety ties that keep the finish
Source: activity, activity_rel
Need a decision
4
no float left to separate them
Source: activity
Project finish
2027-03-14
unchanged by the fixes
Source: activity
Hazards on the current schedule
| Area | When | Activities | Why | |
|---|---|---|---|---|
| A30 | 2027-01-30 to 2027-01-30 1 workday |
IG13 Install bull gear BG-13 and idler gears IG-25, IG-26 Northfield Millwright Services · EL 112 SY010 Reconnect steam joints, syphons and condensate Ironwood Piping · EL 100 |
OVERHEAD IG13 works 12 ft above SY010 | |
| A30 | 2027-01-30 to 2027-01-30 1 workday |
IG13 Install bull gear BG-13 and idler gears IG-25, IG-26 Northfield Millwright Services · EL 112 SY040 Reconnect drives and instruments, loop check Delta Electric and Controls · EL 100 |
OVERHEAD IG13 works 12 ft above SY040 | |
| A30 | 2027-01-30 to 2027-01-30 1 workday |
IG14 Install bull gear BG-14 and idler gear IG-27 Northfield Millwright Services · EL 112 SY010 Reconnect steam joints, syphons and condensate Ironwood Piping · EL 100 |
OVERHEAD IG14 works 12 ft above SY010 | |
| A30 | 2027-01-30 to 2027-01-30 1 workday |
IG14 Install bull gear BG-14 and idler gear IG-27 Northfield Millwright Services · EL 112 SY040 Reconnect drives and instruments, loop check Delta Electric and Controls · EL 100 |
OVERHEAD IG14 works 12 ft above SY040 | |
| A30 | 2027-01-31 to 2027-02-01 2 workdays |
SY010 Reconnect steam joints, syphons and condensate Ironwood Piping · EL 100 SY050 Gear mesh, backlash and runout checks Northfield Millwright Services · EL 112 |
OVERHEAD SY050 works 12 ft above SY010 | |
| A30 | 2027-01-31 to 2027-02-01 2 workdays |
SY040 Reconnect drives and instruments, loop check Delta Electric and Controls · EL 100 SY050 Gear mesh, backlash and runout checks Northfield Millwright Services · EL 112 |
OVERHEAD SY050 works 12 ft above SY040 |
Re-sequence plan
Each tie uses float only; the project finish stays 2027-03-14 and no hard constraint is pushed past its date.
| Area | First | Then | Start moves | Why |
|---|---|---|---|---|
| A30 | IG13 finishes | SY040 starts | 2027-01-30 to 2027-01-31 1 workday later |
IG13 works 12 ft above SY040 |
| A30 | SY010 finishes | SY050 starts | 2027-01-31 to 2027-02-03 3 workdays later |
SY050 works 12 ft above SY010 |
| A30 | SY050 finishes | SY030 starts | 2027-02-03 to 2027-02-05 2 workdays later |
SY050 works 12 ft above SY030 |
Need a decision
These crews cannot be separated without moving the finish, or one of them is already working. Record the overhead protection above, or accept the delay.
| Activities | Overlap | Least delay | |
|---|---|---|---|
| IG13 and SY010 in A30 IG13 works 12 ft above SY010 |
2027-01-30 to 2027-01-30 | IG13 after SY010: finish 1 workday later | |
| IG14 and SY010 in A30 IG14 works 12 ft above SY010 |
2027-01-30 to 2027-01-30 | IG14 after SY010: finish 1 workday later | |
| SY020 and SY050 in A30 SY050 works 12 ft above SY020 |
2027-02-03 to 2027-02-03 | SY050 after SY020: finish 1 workday later | |
| SY050 and SY070 in A30 SY050 works 12 ft above SY070 |
2027-02-04 to 2027-02-04 | SY070 after SY050: finish 1 workday later |
Work elevations
Feet above datum where each crew works (for example 100 at grade, 135 on the rack). P6 exports carry it in an activity code named Elevation; entries here are kept when a new export loads. Blank means unknown, and unknown overlaps are listed for review.
| Area | Activity | Contractor | Crane | Elevation (ft) |
|---|---|---|---|---|
| A10 | IN010 Set new press frames and sole plates | Apex Rigging and Crane | Mobile crane (250t) | |
| A10 | IN015 Grout press sole plates and cure | Granite Grout and Concrete | ||
| A10 | IN020 Install press rolls, suction roll and felt run | Apex Rigging and Crane | Mobile crane (250t) | |
| A10 | IN030 Align the press section | Benchmark Alignment Survey | ||
| A10 | RM010 Remove Voith press section: rolls and felt run | Apex Rigging and Crane | Mobile crane (250t) | |
| A10 | RM020 Remove press section frames and sole plates | Apex Rigging and Crane | Mobile crane (250t) | |
| A20 | CL010 72-hour performance run | |||
| A20 | IB01 Install blow box BB-1 | Northfield Millwright Services | ||
| A20 | IB02 Install blow box BB-2 | Northfield Millwright Services | ||
| A20 | IB03 Install blow box BB-3 | Northfield Millwright Services | ||
| A20 | IB04 Install blow box BB-4 | Northfield Millwright Services | ||
| A20 | IB05 Install blow box BB-5 | Northfield Millwright Services | ||
| A20 | IB06 Install blow box BB-6 | Northfield Millwright Services | ||
| A20 | ID01 Set new dryer D-01 (top tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | ID02 Set new dryer D-02 (bottom tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | ID03 Set new dryer D-03 (top tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | ID04 Set new dryer D-04 (bottom tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | ID05 Set new dryer D-05 (top tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | ID06 Set new dryer D-06 (bottom tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | ID07 Set new dryer D-07 (top tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | ID08 Set new dryer D-08 (bottom tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | ID09 Set new dryer D-09 (top tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | ID10 Set new dryer D-10 (bottom tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | ID11 Set new dryer D-11 (top tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | ID12 Set new dryer D-12 (bottom tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | ID13 Set new dryer D-13 (top tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | ID14 Set new dryer D-14 (bottom tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | IF01 Install felt roll FR-01 (top felt) | Northfield Millwright Services | ||
| A20 | IF02 Install felt roll FR-02 (top felt) | Northfield Millwright Services | ||
| A20 | IF03 Install felt roll FR-03 (top felt) | Northfield Millwright Services | ||
| A20 | IF04 Install felt roll FR-04 (top felt) | Northfield Millwright Services | ||
| A20 | IF05 Install felt roll FR-05 (top felt) | Northfield Millwright Services | ||
| A20 | IF06 Install felt roll FR-06 (top felt) | Northfield Millwright Services | ||
| A20 | IF07 Install felt roll FR-07 (top felt) | Northfield Millwright Services | ||
| A20 | IF08 Install felt roll FR-08 (bottom felt) | Northfield Millwright Services | ||
| A20 | IF09 Install felt roll FR-09 (bottom felt) | Northfield Millwright Services | ||
| A20 | IF10 Install felt roll FR-10 (bottom felt) | Northfield Millwright Services | ||
| A20 | IF11 Install felt roll FR-11 (bottom felt) | Northfield Millwright Services | ||
| A20 | IF12 Install felt roll FR-12 (bottom felt) | Northfield Millwright Services | ||
| A20 | IF13 Install felt roll FR-13 (bottom felt) | Northfield Millwright Services | ||
| A20 | OT010 Shut down, cool down, lockout and tryout | Northfield Millwright Services | ||
| A20 | OT020 Remove press and dryer felts | Northfield Millwright Services | ||
| A20 | OT030 Erect outage scaffolding, tending and drive sides | Summit Scaffold | ||
| A20 | RB01 Remove blow box BB-1 | Northfield Millwright Services | ||
| A20 | RB02 Remove blow box BB-2 | Northfield Millwright Services | ||
| A20 | RB03 Remove blow box BB-3 | Northfield Millwright Services | ||
| A20 | RB04 Remove blow box BB-4 | Northfield Millwright Services | ||
| A20 | RB05 Remove blow box BB-5 | Northfield Millwright Services | ||
| A20 | RB06 Remove blow box BB-6 | Northfield Millwright Services | ||
| A20 | RD01 Remove dryer D-01 (top tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | RD02 Remove dryer D-02 (bottom tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | RD03 Remove dryer D-03 (top tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | RD04 Remove dryer D-04 (bottom tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | RD05 Remove dryer D-05 (top tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | RD06 Remove dryer D-06 (bottom tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | RD07 Remove dryer D-07 (top tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | RD08 Remove dryer D-08 (bottom tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | RD09 Remove dryer D-09 (top tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | RD10 Remove dryer D-10 (bottom tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | RD11 Remove dryer D-11 (top tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | RD12 Remove dryer D-12 (bottom tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | RD13 Remove dryer D-13 (top tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | RD14 Remove dryer D-14 (bottom tier) | Northfield Millwright Services | Machine room crane (60t) | |
| A20 | RF01 Remove felt roll FR-01 (top felt) | Northfield Millwright Services | ||
| A20 | RF02 Remove felt roll FR-02 (top felt) | Northfield Millwright Services | ||
| A20 | RF03 Remove felt roll FR-03 (top felt) | Northfield Millwright Services | ||
| A20 | RF04 Remove felt roll FR-04 (top felt) | Northfield Millwright Services | ||
| A20 | RF05 Remove felt roll FR-05 (top felt) | Northfield Millwright Services | ||
| A20 | RF06 Remove felt roll FR-06 (top felt) | Northfield Millwright Services | ||
| A20 | RF07 Remove felt roll FR-07 (top felt) | Northfield Millwright Services | ||
| A20 | RF08 Remove felt roll FR-08 (bottom felt) | Northfield Millwright Services | ||
| A20 | RF09 Remove felt roll FR-09 (bottom felt) | Northfield Millwright Services | ||
| A20 | RF10 Remove felt roll FR-10 (bottom felt) | Northfield Millwright Services | ||
| A20 | RF11 Remove felt roll FR-11 (bottom felt) | Northfield Millwright Services | ||
| A20 | RF12 Remove felt roll FR-12 (bottom felt) | Northfield Millwright Services | ||
| A20 | RF13 Remove felt roll FR-13 (bottom felt) | Northfield Millwright Services | ||
| A20 | SU010 Remove locks and hand the machine back to operations | |||
| A20 | SU020 Dry run and jog the drives | |||
| A20 | SU030 Hang new press and dryer felts | Northfield Millwright Services | ||
| A20 | SU040 Steam up and warm the dryers | |||
| A20 | SV010 Survey the frames after removal | Benchmark Alignment Survey | ||
| A20 | SY060 Final alignment survey: press and dryers | Benchmark Alignment Survey | ||
| A20 | SY080 Strike outage scaffolding | Summit Scaffold | ||
| A20 | SY090 Punch walk and pre-startup safety review | |||
| A30 | IG01 Install bull gear BG-01 and idler gears IG-01, IG-02 | Northfield Millwright Services | ||
| A30 | IG02 Install bull gear BG-02 and idler gears IG-03, IG-04 | Northfield Millwright Services | ||
| A30 | IG03 Install bull gear BG-03 and idler gears IG-05, IG-06 | Northfield Millwright Services | ||
| A30 | IG04 Install bull gear BG-04 and idler gears IG-07, IG-08 | Northfield Millwright Services | ||
| A30 | IG05 Install bull gear BG-05 and idler gears IG-09, IG-10 | Northfield Millwright Services | ||
| A30 | IG06 Install bull gear BG-06 and idler gears IG-11, IG-12 | Northfield Millwright Services | ||
| A30 | IG07 Install bull gear BG-07 and idler gears IG-13, IG-14 | Northfield Millwright Services | ||
| A30 | IG08 Install bull gear BG-08 and idler gears IG-15, IG-16 | Northfield Millwright Services | ||
| A30 | IG09 Install bull gear BG-09 and idler gears IG-17, IG-18 | Northfield Millwright Services | ||
| A30 | IG10 Install bull gear BG-10 and idler gears IG-19, IG-20 | Northfield Millwright Services | ||
| A30 | IG11 Install bull gear BG-11 and idler gears IG-21, IG-22 | Northfield Millwright Services | ||
| A30 | IG12 Install bull gear BG-12 and idler gears IG-23, IG-24 | Northfield Millwright Services | ||
| A30 | IG13 Install bull gear BG-13 and idler gears IG-25, IG-26 | Northfield Millwright Services | ||
| A30 | IG14 Install bull gear BG-14 and idler gear IG-27 | Northfield Millwright Services | ||
| A30 | LB01 Line bore and sleeve idler bearing bore IB-1 | Precision Line Boring Co | ||
| A30 | LB02 Line bore and sleeve idler bearing bore IB-2 | Precision Line Boring Co | ||
| A30 | LB03 Line bore and sleeve idler bearing bore IB-3 | Precision Line Boring Co | ||
| A30 | LB04 Line bore and sleeve idler bearing bore IB-4 | Precision Line Boring Co | ||
| A30 | LB05 Line bore and sleeve idler bearing bore IB-5 | Precision Line Boring Co | ||
| A30 | OT040 Disconnect steam, condensate and lube oil | Ironwood Piping | ||
| A30 | OT050 Disconnect drives and instruments | Delta Electric and Controls | ||
| A30 | RG01 Remove bull gear BG-01 and idler gears IG-01, IG-02 | Northfield Millwright Services | ||
| A30 | RG02 Remove bull gear BG-02 and idler gears IG-03, IG-04 | Northfield Millwright Services | ||
| A30 | RG03 Remove bull gear BG-03 and idler gears IG-05, IG-06 | Northfield Millwright Services | ||
| A30 | RG04 Remove bull gear BG-04 and idler gears IG-07, IG-08 | Northfield Millwright Services | ||
| A30 | RG05 Remove bull gear BG-05 and idler gears IG-09, IG-10 | Northfield Millwright Services | ||
| A30 | RG06 Remove bull gear BG-06 and idler gears IG-11, IG-12 | Northfield Millwright Services | ||
| A30 | RG07 Remove bull gear BG-07 and idler gears IG-13, IG-14 | Northfield Millwright Services | ||
| A30 | RG08 Remove bull gear BG-08 and idler gears IG-15, IG-16 | Northfield Millwright Services | ||
| A30 | RG09 Remove bull gear BG-09 and idler gears IG-17, IG-18 | Northfield Millwright Services | ||
| A30 | RG10 Remove bull gear BG-10 and idler gears IG-19, IG-20 | Northfield Millwright Services | ||
| A30 | RG11 Remove bull gear BG-11 and idler gears IG-21, IG-22 | Northfield Millwright Services | ||
| A30 | RG12 Remove bull gear BG-12 and idler gears IG-23, IG-24 | Northfield Millwright Services | ||
| A30 | RG13 Remove bull gear BG-13 and idler gears IG-25, IG-26 | Northfield Millwright Services | ||
| A30 | RG14 Remove bull gear BG-14 and idler gear IG-27 | Northfield Millwright Services | ||
| A30 | SY010 Reconnect steam joints, syphons and condensate | Ironwood Piping | ||
| A30 | SY020 Hydro test dryers and steam joints | |||
| A30 | SY030 Flush the lube oil system | Ironwood Piping | ||
| A30 | SY040 Reconnect drives and instruments, loop check | Delta Electric and Controls | ||
| A30 | SY050 Gear mesh, backlash and runout checks | Northfield Millwright Services | ||
| A30 | SY070 Insulate steam and condensate piping | ThermaCoat Insulation | ||
| A80 | FB010 Fabricate new press section (OEM) | |||
| A80 | FB020 Press section factory acceptance test | |||
| A80 | FB030 Ship press section to the mill | |||
| A80 | FB110 Receive, inspect and stage all equipment at the laydown | Northfield Millwright Services | ||
| A90 | CL020 Close the punch list | |||
| A90 | CL030 Turnover packages accepted by the mill | |||
| A90 | CL040 As-built drawings and alignment reports | |||
| A90 | CL050 Final cost report and lessons learned | |||
| A90 | PR080 Outage readiness review with the mill |