LCD splicing screen project process: selection, quotation, installation, acceptance and stage handover standards

Instead of repeating technical parameters and role division, the four stages of "selection-quotation-installation-acceptance" are strung together into a project process chain with handover standards, card-point cracking and time nodes.

The most common occurrence of splicing screen projects is not "can't do it", but "stuck between stages".The plan was fixed and the quotation was submitted for three rounds, but the quotation subjects of the three companies were different, and Party A could not compare the prices. When the equipment arrived, the engineer found that the wall did not bear enough weight. The plan had to be changed, the construction period had to be extended and the cost had to be discussed again. After the system was installed, Party A said that "the conditions for use have not been met". After the acceptance was delayed for three months, the payment, the payment from the integrator and the payment was suspended.These problems are not that a certain stage is not well done, but that there is no "handover stick" between stages-the output of the previous stage has not become the input of the next stage, the conditions for entering the next stage are not clearly written, and they are stuck. I don't know who to look for and on what basis to break the game.This article does not repeat how to choose technical parameters, how to divide the roles of the three parties, and how to give those contents to the corresponding special articles. This article only does one thing: string the four stages into oneHandover standards, process card points, time nodes and dispute resolution mechanismsThe project process chain, so that the project from demand to delivery really go through, go.

1. first look at a timeline: four stages, five milestones and three handover stages.

The value of the project process article is not in "what to do at each stage", but in "when to do what and to what extent to enter the next stage". The following timeline shows the four stages and key milestones.

• Milestone: Requirement Confirmation (Starting Point of Selection Phase) Party A's requirement definition form is completed, and the integrator and engineer review and sign it. This is the "input condition" of the whole project, and it shall prevail for all subsequent schemes, quotations and construction.
• Milestone 2: double confirmation of scheme and site conditions (type selection → handover of quotation) The integrator completes the scheme design, the engineer completes the formal site investigation (wall, load-bearing, power supply, network, maintenance space), and the two documents sign each other for confirmation. The quotation phase can only be entered at this time.
• Milestone 3: quotation and contract scope lock (quotation → handover of installation) Party A completes the horizontal comparison of the quotation, the signing of the contract, and the writing of the scope and responsibilities. Only then can equipment orders and construction schedules be arranged.
• Milestone 4: installation and commissioning are completed, and the preliminary inspection is passed (handover of installation → acceptance) The engineering contractor completes the construction, the integrator completes the commissioning, and the test records are signed by both parties. At this time to enter the formal acceptance.
• Milestone 5: Final Inspection Passing and Quality Assurance Starting Calculation (Project Cogging) Party A shall organize the final inspection, the signing of the acceptance report, the calculation of the warranty period, and the completion of training and operation and maintenance handover. The project is officially closed.

2. selection stage: not "select equipment", but "lock input conditions"

The most common mistake in the selection stage is to compare parameters, brands and prices as soon as they come up. The correct order is to lock the "input conditions" of the project first, and then let the technical parameters match the conditions. Whether the stitching is 3.5 or 1.8, the size is 55 or 65, and the resolution is 1080P or 4K, all depend on the same set of inputs:Scene, closest viewing distance, available wall dimensions, source list, runtime, budget boundary.The input conditions are not clear, and the parameters are idling.

Judgment sequence of type selection stage

Parameter selection has a sequential dependency and cannot be tiled at the same time. One available order is:

1. Set the scene and viewing distance first.Surveillance, showrooms, conference rooms, retail, what is the nearest viewing distance-this determines the lower limit of single-screen size and patchwork level.
2. Re-measure the available wall dimensions.After deducting the maintenance space, cabinet height and wrapping edge, several columns and rows can be placed-this determines the number of splicing columns and the feasible range of single screen size.
3. Then make a list of sources.The number of cameras, computers, playback boxes, and conference terminals, and the native resolution-this determines the specifications and number of processors, matrices, and decoders.
4. Re-confirm the run time and environmental conditions.Whether it is 7 × 24, how much ambient illuminance, and whether there is dust vibration-this determines the panel level (industrial or commercial) and brightness level.
5. Finally, make a choice with the budget.In the scheme that meets the first four items, the flat-splice grade, panel source and accessory grade shall be selected according to the budget.

The key to this sequence is:The front judgment is the back constraint. Set the viewing distance before you know whether the seam should go to 0.88mm. First measure the wall surface before you know whether the 55-inch three columns will be too wide. The signal source is listed first before we know whether the processor needs multiple 4K inputs. Skip the front directly than the price, and often end up pushing back and coming back.

Two core documents for the selection phase

Requirements Definition TableTo be completed by Party A and verified by the integrator and the engineering contractor. The core fields include application scenario, nearest viewing distance, available wall size, signal source list (type x quantity x native resolution), whether to run 7 x 24, acceptance core indicators, budget range, and later expansion plan. This table is the "constitution" of the project, and it shall prevail for subsequent plans, quotations and acceptance.The fields that Party A cannot fill in are the fields that need to be confirmed on site by the three parties before the scheme stage, instead of "discovering" them at the construction stage ".

Site Condition Investigation Table: completed by the engineer and signed by the integrator for confirmation. The core content includes wall type and load-bearing accounting, power capacity and socket location, network access conditions, heat dissipation and maintenance space, construction channels and operating conditions.Site investigation must be completed in the selection and scheme stage and cannot be delayed to the installation stage. If the investigation is not carried out until the equipment is placed and the plan is decided to die, and it is found that the wall is not sufficiently load-bearing or maintenance space is insufficient, it will be reworked or changed, and the cost and construction period loss will be borne by the project.

3. quotation stage: not "than the total price", but "than the three comparability"

The cards in the quote phase are very concentrated:The price difference reported by the three companies is 30%. Party A does not see where to travel. Integrators feel that the price has been reduced and engineers are worried that the construction scope will be reduced. The root cause is that the subject composition of the quotation is inconsistent-some include processors without cables, some include installation without debugging, some use A panel for screen body and some use A level. Only than the total price, equal to than three "account is not the same" bill.

split the quotation into three paragraphs and align them item by item

A comparable quotation for splicing screen shall be split into at least three paragraphs:Equipment and boards, integration and construction, service and delivery. After the three sections are separated, Party A can see in which section the low price is saved-whether the equipment uses low-grade panels, the scope of integrated construction shrinks, or the service delivery is compressed into "only communication number but not plan".

Operational actions of Party A's horizontal price comparison

All bidders are required to submit their quotations using the same itemized pricing template, rather than accepting quotation forms with varying formats. Focus on checking four types of "incomparable items": whether the screen body indicates the specific model and panel grade; Whether the processor indicates the continuous processing capacity under the target number of input channels and the number of windows opened; Whether the brand, version and length of the cable are specified; Whether the installation fee covers wall reinforcement, high-altitude operation and demolition of old equipment.Any item that says "standard", "actual" and "another discussion" should be clarified in writing at the bid evaluation stage, not after the contract is signed.

Five types of clauses that must be locked in a contract

The end of the offer is the contract, and the contract is the only basis for adjudication when a dispute occurs. The following five categories of clauses should be confirmed one by one before signing the contract, instead of copying the template:ACCEPTANCE CRITERIA CLAUSE(Quantify the value, do not write "meet the requirements");Duration and delay liability clause(Distinguish between equipment arrival delay and construction delay);Amendment Clause(The pricing method of expansion, location change and signal source change shall clarify the specific meaning of "expandable");Warranty Starting and Spare Parts Supply Terms(From the acceptance, specify the supply period of spare parts);Payment and Acceptance Linked Clause(specify the time limit for starting acceptance and the condition that "overdue acceptance is deemed to be passed").

4. installation stage: not "to the site to see", but "according to the confirmed conditions of construction"

The most common mistake in the installation stage is to put the scene investigation in this stage. If you wait until the equipment arrives and the engineer enters the site before you start to look at the wall load-bearing, power supply capacity and maintenance space, the plan has been fixed and the equipment has been ordered. If problems are found, you can only rework or change them.The correct positioning is: the installation stage is "according to the site conditions confirmed in the selection and scheme stage", not "to the site to start to confirm the conditions".

Three parallel lines in the installation phase

The installation phase is not a single action, but three lines are advanced in parallel. Any problem in one line will slow down the whole:

• Structure and installation line (engineering led)Wall reinforcement, bracket installation, screen fixing, leveling and sewing. The quality of this line directly determines the uniformity and surface flatness of the flat seam, and also determines whether the later maintenance is convenient.
• Signal and integration line (integrator-led): Cable laying, equipment connection, processor/matrix/decoder configuration, signal link segmentation test. The key to this line is "segmented testing"-signal source to processor, processor to screen, confirmed segment by segment, instead of debugging together after all.
• Commissioning Verification Line (Integrator and Engineer): display effect (brightness, stitching, color consistency), system function (screen projection, window opening, roaming, remote management), business process (whether real tasks can be completed). Debugging is not "power on to see whether it is bright or not", but check item by item according to the acceptance indicators in the demand definition table.

Three records that must be produced during the installation phase

Acceptance Sheet of Construction Records and Concealed Works: Record the wall reinforcement method, bracket installation position, cable laying path and power access point, which shall be filled in by the engineer and signed by the integrator and Party A's representative. Once the concealed works are sealed, it is difficult to trace back the problems in the later period, and the acceptance must be completed before the sealing plate.

Signal Link Segment Test Record: Test and record section by section according to "signal source → processor → cable → screen body", which shall be filled in by the integrator and signed by the engineer to confirm the cable construction quality. This record is the key basis for distinguishing between "equipment problems" and "construction problems", and is also the basis for initial and final inspection.

Commissioning Record and Rectification List: Record the display, function and process problems found during debugging, and specify the responsible party and rectification period. The commissioning record is not an "internal work log", but a necessary document to enter the acceptance stage.

5. acceptance stage: not "normal power", but "three-level acceptance dispute settlement mechanism"

The most common mistake in the acceptance stage is to regard "the picture is normal after power-on" as passing the acceptance. The real acceptance is three-level progressive:Arrival acceptance, installation acceptance, function and process acceptance. All three levels have passed before entering the final inspection and quality assurance calculation.

Contents of Level 3 Acceptance

Level 1: Acceptance on arrival. Check whether the packaging appearance, product model and quantity, serial number, accessories and project information are complete. This is the first pass of project risk, and many problems of equipment degradation and model discrepancies can be found when they arrive. Abnormalities must be recorded on the spot and confirmed by the supplier, and cannot be "signed for first".

Level 2: installation acceptance. Check the wall reinforcement, bracket fixing, screen body leveling and joint, power supply and cable construction, heat dissipation and maintenance space. The core of this level is "hidden engineering record" and "installation accuracy"-if the uniformity and surface flatness of the flat seam are not up to standard at this level, it will be difficult to make up for it through debugging.

Level 3: functional and process acceptance. Check the display effect (brightness, resolution, patchwork, color consistency), system function (screen projection, window opening, roaming, remote management), business process (whether it can complete the real task). This level must be based on the acceptance indicators in the Demand Definition Table, rather than judging "whether it looks good or not" based on subjective feelings ".

What to do if the acceptance does not pass: the processing mechanism is more important than the acceptance criteria

The acceptance criteria are written in more detail. If the acceptance fails, there is no handling mechanism and the dispute cannot be resolved. The following four mechanisms shall be agreed in advance in the contract or acceptance plan.

First, the responsibility for rectification is determined: first qualitative, then responsibility. When the acceptance fails, the first step is not to blame, but to record the problem phenomenon in writing and identify it: whether it is the defect of the product itself (panel bad spot, uneven brightness), installation accuracy problem (uneven patching, flatness out of tolerance), signal link problem (resolution mismatch, black screen switching), or function failure (plan not configured, touch not calibrated). The qualitative basis is the quantitative criteria and test records in the contract. When the characterization is clear, the responsible party is naturally clear; skipping the characterization and direct accountability will only lead to a cycle of three parties holding different opinions.

Second, the rectification period and re-inspection time limit: set the time limit to avoid infinite cycle. The contract shall stipulate: how long will the responsible party complete the rectification after the acceptance fails? How long will Party A organize the re-inspection after the rectification is completed? If the re-inspection still fails, whether to continue the rectification, deduct the contract amount, or trigger the breach clause. The "rectification-re-inspection" cycle, which has no time limit, is a common reason for dragging out project refunds and deliveries.

The third is the payment processing during the rectification period: distinguish between the undisputed part and the disputed part. If the acceptance fails, it is reasonable that the acceptance payment will not be paid for the time being. However, the part that has passed the stage acceptance or the equipment payment unrelated to the disputed item shall not be frozen as a whole. The contract may stipulate that "the undisputed part shall be paid first, and the disputed part shall be paid after rectification and re-inspection", so as to avoid the stagnation of the whole payment due to local problems.

Fourth, the handling of Party A's delay in acceptance: written reminders are deemed to be approved clauses. If Party A delays the acceptance without justifiable reasons, the integrator and the engineer shall issue a written reminder and keep the delivery record. The clause in the contract stating that “failure to accept the work on time and failure to raise a written objection shall be deemed as acceptance” is the key to breaking the deadlock. Government projects should also address the requirements of acceptance audits by preparing comprehensive change records and test documentation in advance to avoid post-audit deductions.

6. stage handover criteria: to what extent can we enter the next stage

Four stages is not a list of four juxtaposed, but a chain with a hand-over bar. Each handover requires clear "completion conditions" and "signature documents", otherwise the problems left over from the previous stage will be brought to the next stage, which will become more difficult to solve in the future.

7. four types of project process differences: the same set of processes, different weights and risks.

The four-stage framework is applicable to all projects, but governments, enterprises, retail chains and transformation projects vary greatly in process rhythm, decision chain and risk focus. The same set of processes has different "stuck points" in different projects.

The core risks of government projects are "parameter compliance in the selection stage" and "audit traceability in the acceptance stage"; The core risks of enterprise projects are "service shrinkage caused by price reduction" and "compatibility with existing systems"; The core risks of retail chain are "organization and site adaptation of multi-store parallel construction"; The core risks of the renovation project are "the connection between the old and the new and the short window construction". The same process framework has a completely different risk focus, and additional confirmation and buffers should be reserved at the corresponding stage when the project starts.

8. common process errors

• Misunderstanding 1: Put the site investigation in the installation stage.Only when the equipment arrives and the engineer enters the site can the survey be conducted. The plan has been decided and the equipment has been ordered. If it is found that the load bearing is insufficient or the space is insufficient, it can only be reworked. The survey must be completed at the stage of type selection and scheme, and filled in by the engineer and signed by the integrator for confirmation.
• Myth 2: Think of the four stages as four side-by-side lists.There are no handover standards and signature documents between the stages, and the problems left over from the previous stage are brought to the next stage, which will become more difficult to solve. Each handover stage must have a “completion criteria and signature document.”
• Myth 3: The quotation is only more than the total price, not three paragraphs.The price difference between the three reports is 30%, but the subjects are different. The cheapest one is often added in the later period. It must be aligned item by item according to the three paragraphs "equipment and boards, integration and construction, service and delivery", and written clarification is required for items not listed.
• Myth 4: Acceptance criteria are written as subjective descriptions."Clear picture and even patchwork" cannot be used as the basis for acceptance. Quantitative indicators (patchwork ≤ X mm, brightness uniformity ≥ X%, bad spots ≤ X) can make acceptance based on evidence and rectification responsibility based on evidence.
• Misunderstanding 5: The contract only writes the total price and construction period, not the acceptance, change and warranty starting calculation.The contract is the only basis for adjudication in the event of a dispute. Acceptance criteria, duration delay liability, change pricing, quality assurance calculation, payment linkage five types of provisions, any kind of lack will become a deadlock in the dispute.
• Misunderstanding 6: If the acceptance is not passed, only accountability will be pursued, not qualitative first.Skip the "problem characterization" and directly pursue the responsibility. The three parties hold their own opinions. The dispute cannot be converged. The phenomenon is first recorded in writing and characterized by quantitative criteria, and the attribution of responsibility is naturally clear.
• Misunderstanding 7: There is no response mechanism for Party A to delay acceptance.There is no acceptance start-up time limit, rectification time limit, re-inspection time limit and "overdue as passed" clause, acceptance can be suspended indefinitely, collection and project closure are dragged to death.

9. FAQ

10. Conclusion