Note
Scheduling Around the Thai Busy Season: March to May
If you run installation crews in Thai factories, you already know what the busy season feels like. March, April, and the stretch into May compress the year’s heaviest installation demand into a window where available working days are also at their lowest. The client list that looked manageable in January turns dense. Each project manager carries commitments to different factories with the same delivery window. And the technician pool that seemed adequate begins to look thin.
The contractors who handle this period well are not the ones with the most technicians. They are the ones who counted their available days before they committed them.
Why does factory electrical installation peak between March and May?
Several pressures converge in this window.
Factory procurement teams that received budget approval at the end of the previous year often have installation deadlines tied to the first half of the new year. For solar projects, there is an additional pressure: commissioning before the monsoon season makes rooftop access and testing more difficult. A factory that wants a solar system generating revenue in the second half of the year needs the installation complete and commissioned in Q1 or early Q2.
LED retrofit projects in industrial facilities follow the same cycle. Budget approval in Q4, installation scheduled for Q1 or Q2, ideally wrapped before mid-year shutdowns restrict access to production floors.
Then April arrives with Songkran, the Thai New Year. The official holiday falls in mid-April, and in practice the working days lost depend on the company and region. What is predictable is this: April has fewer usable working days than the calendar suggests, and projects planned to finish in April regularly slip into May. May also carries national holidays. The result is a three-month window in which demand is at its highest and available days are at their most constrained.
What does a peak season look like for a crew of 20?
The numbers matter here, so consider a hypothetical example that you can run against your own headcount.
A team of 20 permanent technicians in a standard March has around 440 technician-days available (20 technicians x 22 working days). In April, with Songkran and related days removed, the same crew might have 320 to 340 technician-days, depending on the company’s holiday policy. May typically sits somewhere between the two.
The combined window for March through May might run 1,100 to 1,200 technician-days in total. That number is fixed by your headcount and the calendar. It does not grow because the project list grew.
Now suppose four project managers have separately committed to projects each estimated at 300 technician-days. Total demand: 1,200 days in a window that holds exactly that, with no buffer for a single overrun. And peak-season overruns are common. Site access at industrial facilities, power isolation scheduling with the factory’s own maintenance team, and rework from a rushed close can each add several days to a project.
The overcommitment is invisible when each manager makes their booking in October or November. It becomes visible in February, when there is no room to move anything.
Why does planning break down when demand spikes?
The core problem is visibility. Each project manager sees their own load. Nobody sees total technician-day demand across all running projects in the same window.
Without that consolidated view, each commitment looks reasonable. With one, over-allocation surfaces in October when there is still time to act: push a flexible project to June, phase a start date, or have an honest conversation with a client about what is actually achievable.
The busy season does not create the problem. It reveals it.
How do you plan for a peak you can see coming?
Start with supply, not with the incoming project list. Before Q4 bookings begin to arrive:
- Count your confirmed technician headcount for March, April, and May
- Remove known leave, training blocks, and national holidays from each month
- Apply a buffer of 15 to 20 percent for site access delays, factory coordination, and rework from rushed installations
- Write down what remains: that is your real available capacity for the window
Then map incoming projects against that number, not against an informal sense that “we should be fine.” That mapping only works if each project type already carries a technician-day cost attached before anyone agrees to it.
Two principles help with sequencing:
Sequence by rigidity. Projects with fixed commissioning dates, a solar grid interconnection appointment, or a factory shutdown window that cannot move, those go in first. Flexible projects fill around them, not the reverse.
Reserve the Songkran window. Do not commit a fresh installation start for the week that runs into mid-April. Use that period for documentation, site punch lists, internal training, and rework from the previous week’s jobs.
What changes when you plan on a staffed board?
Without a board, commitment happens in separate conversations and individual project files. The total technician-day load is visible to nobody, including the person taking the new booking.
A board that shows each technician’s days by week makes over-allocation visible at the moment of commitment. It is the check you would run before giving any prospect a start date, applied to a whole season at once. When a project manager asks to add a project for April, the board shows exactly how many days remain. If 60 days are already committed and the new project needs 80, that conversation happens in November, when the client can still adjust their timeline. Not on the morning the factory is expecting the crew to arrive.
This is not about turning work away. It is about making commitments with accurate information.
FAQ
What if a February project overruns into March?
Build a buffer of unassigned technician-days in the first two weeks of March specifically for this. Projects slip forward, not backward. A reserved block at the start of March absorbs the overflow without cascading into other projects committed to that slot. If the February project finishes on time, the buffer simply becomes available capacity for early-March work.
Does the busy season pattern apply to LED retrofits as well as solar?
Yes. LED retrofit approvals arrive in Q4, installation targets land in Q1 and Q2, and the preference for wrapping before mid-year access restrictions makes the window identical. Both types of work draw on the same technicians in the same months. During peak season, a contractor running both solar and LED work is competing with themselves for crew time.
Can temporary technicians cover a peak season shortfall?
For some tasks, yes. For factory electrical work that requires familiarity with industrial panel layouts and site-specific safety inductions, the ramp-up cost often reduces the benefit. A temporary technician who needs two days of site orientation before working independently is not as useful in a ten-day project window as the headcount suggests. Planning around your permanent crew and making commitments that match their real capacity is more reliable than assuming additional hands will be available and productive on short notice.
The busy season is visible from October. The capacity is fixed in March. The only variable is when you looked.
If you want a board that shows your team’s technician-days by month before you commit to peak-season projects, the details for TRACE 30 are at /program/. You can also book a call to see how the install works.