The AOS blog.
Product updates, engineering notes, and field thinking from the team building one operating system for every seat in AEC. We ship every week — this is what's new and why it matters.
Latest posts.
Start with the sub-side thesis (featured) or jump into one of the newest pieces. Older posts are in the archive below; full coverage by topic is in the tag pages above.
Subcontractors are the most under-served seat in construction technology.
Most construction platforms are GC-first. They give subs a free portal to log into and call it done — while the sub's own business runs on duct tape and four GC portals. Here's why that gap exists, what it costs the sub side of every commercial project, and what we're doing about it.
Construction safety management and EMR: a working guide for mid-market commercial subs.
Safety management is the workflow that determines whether your firm can keep winning commercial work, what your workers' comp insurance costs, and (most fundamentally) whether the people on your jobsites go home in the same condition they arrived. EMR — the Experience Modification Rate — is the single number every GC will check during prequal, every insurance underwriter will base your rate on, and every owner will use to filter eligible bidders on certain projects. This is a working guide for mid-market commercial subs on how safety actually has to work.
Construction project scheduling: CPM, baseline, and the working schedule.
The project schedule is the document that determines whether your project hits substantial completion on time — or slips by weeks while the GC and subs argue about whose delay caused which milestone to miss. CPM scheduling, baseline vs working schedule, weekly look-aheads, delay attribution, and concurrent delay analysis are the workflows that separate projects that ship on time from projects that ship at all. This is a working guide for mid-market subs and GCs on how project scheduling actually has to work.
Construction warranty management: from substantial completion through the warranty period.
The construction warranty period starts the day after substantial completion and runs for one year on most commercial projects — longer for specific systems (roofing, glazing, mechanical equipment, foundation work). Whether that warranty period goes smoothly for the GC or sub depends almost entirely on how well warranty obligations were documented at closeout and how the warranty-claim workflow is structured. This is a working guide on construction warranty management.
Subcontractor prequalification for general contractors: a working framework.
Subcontractor prequalification is the GC's first line of defense against project risk — bonding capacity, insurance coverage, safety record, financial stability, references, and operational capacity all checked before the sub bids, not after they've been awarded. Done well, it filters out the firms most likely to default mid-project, deliver substandard work, or generate liability exposure. Done as a paperwork ritual, it produces a binder full of stale forms and zero actual screening.
Construction punch list management: from substantial completion to certificate of occupancy.
The punch list is the workflow that determines whether your project actually closes out cleanly — or sits in punch limbo for months while the GC and subs argue about who owns which incomplete item. The list itself isn't complicated. The management of it, across the sub-GC-owner-architect chain, is where projects either ship on time or grind to a halt three weeks before substantial completion. This is a working guide on construction punch list management.
Construction RFI management: from field question to architect response without inbox limbo.
The RFI — Request for Information — is the workflow that determines whether questions raised in the field get clean answers in time to keep work moving, or whether they pile up in email inboxes until the schedule slips. RFI cycle time and resolution rate are two of the most consequential metrics on every commercial project, and most of the time they're not measured because nobody owns the log. This is a working guide for mid-market subs and GCs on RFI management.
Construction submittal management: from log entry to install approval without version drift.
Submittals are the workflow that determines whether the product installed on your project actually matches what the architect specified. Get them right and the install proceeds cleanly. Get them wrong — missing approvals, version drift between the approved submittal and the installed product, or install-without-approval — and you're rebuilding a wall on your own dime, or arguing at closeout about whether the substituted product meets the spec. This is a working guide to the submittal lifecycle for mid-market commercial subs and GCs: the submittal vs RFI workflow distinction, the architect's SLAs, the recurring failure modes, and how AOS handles the cross-tenant flow.
Construction cost coding and chart-of-accounts decisions for mid-market firms.
Cost coding is the most consequential foundational decision in a commercial construction firm's accounting setup, and it's the decision most often made by accident — inherited from the predecessor controller's 2014 setup, copied from the GC down the street, or matched to the estimator's spreadsheet templates from a prior firm. This is a working guide for mid-market commercial subs and GCs on how cost coding should be designed, why cost-code drift across systems is the root cause of pay-app reconciliation pain, and how to think about restructuring without breaking the historical record.
Construction COI compliance: how subs maintain coverage and how GCs actually verify it.
Certificate of Insurance compliance is one of the most labor-intensive recurring administrative tasks in commercial construction. Subs maintain four to six active policies, file COIs to every GC client on every active project, and chase renewals continuously. GCs verify dozens of COIs across hundreds of active sub-project relationships and have to track expirations against every project they're on. The cost of getting this wrong — whether you're the sub whose policy lapses mid-project or the GC who paid an uninsured sub — ranges from "annoying" to "company-ending." This is a working guide for both sides on how COI compliance actually works, the recurring mistakes, and how AOS handles the lifecycle.
By topic.
25 posts organized into six topic clusters. Pick the one closest to your seat — each tag page lists every post on that topic.
For subcontractors 17 posts
Sub-side workflows: ITB inbox, pay applications, retention rollforward, lien waivers, field operations, safety/EMR, prequalification, and what changes when the GC across the table is also on AOS.
Browse for subcontractors →For general contractors 15 posts
The mid-market GC stack: AP automation, change orders, closeout binders, RFIs, submittals, subcontractor prequal, scheduling, and what to replace the 4-6 vendor patchwork with.
Browse for general contractors →Construction accounting 5 posts
AIA G702/G703 pay applications, retention rollforward, lien waivers, AP automation, and cost-coding decisions for mid-market subs and GCs.
Browse construction accounting →Compliance 5 posts
Lien waivers state-by-state, Davis-Bacon prevailing wage and certified payroll, COI tracking, safety/EMR management, and the compliance backbone for commercial firms.
Browse compliance →Project management 7 posts
Change orders, RFIs, submittals, punch lists, scheduling, warranty, and closeout binders — the project-management workflows that determine whether a project ships on time and on budget.
Browse project management →Cross-tenant on one record 2 posts
The strategic differentiator: when both the GC and the sub share the same project record, document handoffs disappear. Workflow-by-workflow walk-through.
Browse cross-tenant on one record →The archive.
Every post we've published, with the launch announcement at the end. Or jump straight to the subcontractor or general contractor archives.
- May 27, 2026 The ITB process for commercial subcontractors: from bid invitation to award without losing days to GC portal chaos. 7 min read
- May 27, 2026 Prevailing wage and certified payroll for mid-market commercial subs: a 2026 working guide. 9 min read
- May 27, 2026 Construction change orders: four patterns and how to manage them without margin erosion. 8 min read
- May 27, 2026 The construction closeout binder: continuous assembly instead of closeout-week panic. 8 min read
- May 27, 2026 Why GCs should care about their subs' tech stack. 7 min read
- May 27, 2026 Construction AP automation and tiered approval for mid-market GCs. 8 min read
- May 27, 2026 Construction lien waivers explained: a state-by-state guide for subcontractors and GCs. 9 min read
- May 27, 2026 A field-tech adoption playbook for self-perform specialty trades. 7 min read
- May 27, 2026 Construction retention rollforward by GC: a working guide for sub accounting. 7 min read
- May 27, 2026 When the GC and the sub share a record: what actually changes on a commercial project. 8 min read
- May 27, 2026 Procore alternatives for subcontractors and mid-market GCs in 2026. 9 min read
- May 27, 2026 Why the mid-market GC software stack is broken (and what to put in its place). 10 min read
- May 27, 2026 AIA G702 and G703 for subcontractors: a working guide. 8 min read
- May 27, 2026 How to choose construction software when you're a mid-market sub or GC. 6 min read
- May 22, 2026 Introducing AOS — one operating system for every seat in AEC. 5 min read