dissenting. The appellant challenges a Vermont Employment Security Board decision finding him disqualified for unemployment benefits under 21 V.S.A. § 1344(a) (2) (A). In dealing with this claim, the majority rewrites Anglo-American jurisprudence, informing us that “equity precedes the *516law.” With this, quite clearly, I can not agree. The law dictates the proper decision in this case. Further, this Court should not second guess and supersede the Board’s informed judgment without a factual basis clearly dictating such action. The majority here even admits that this is a close question. We are not a trial court, and should not impose our biases on the tribunals duly authorized to make such decisions.
The claimant was employed for six years as chief butter maker by Cabot Farmers Co-op Creamery Company. His employment contract called for a 45 hour work week at a rate of $4.40 per hour for 40 hours and $6.60 per hour of overtime. For several years he averaged 72 hours per week, except in the summer months when he worked about 50 hours per week. The appellant worked as much as 80-95 hours per week during the past li/á years, although the amount of overtime fluctuated.
The employer, faced with a new order necessitating a 40% increase in butter production during the appellant’s vacation in June 1979, hired an additional butter maker and initiated two shifts. There is no evidence that the appellant ever feared he would be forced to work less than the 45 hours guaranteed in his contract. In fact, the two butter makers currently employed average at least 60 hours per week.
Faced with an apparent reduction in work hours, the appellant gave 1 weeks notice upon returning from vacation that he was quitting his job. During the notice period, he worked approximately 56-58 hours per week. The majority opinion flatly concludes that this constitutes a 40% reduction in gross wages. I am unable to understand such mathematics in view of the record’s clear indication that claimant’s hours vastly fluctuated over the term of his employment. The Board also found that the appellant did not notify his employer that he was leaving as a result of the anticipated reduction in work hours. Although that finding is challenged, it is irrelevant to this decision.
The appellant claims that the unilateral reduction in the number of overtime hours provided the requisite good cause attributable to his employer to avoid disqualification for unemployment compensation benefits, pursuant to 21 V.S.A. § 1344(a)(2)(A). He claims that the custom which developed during the six years of employment created an im*517plied contract assuring overtime work or, in the alternative, that the practice of working overtime created a legitimate expectation that the schedule would not be reduced. I disagree.
“Good cause attributable to an employer” is an amorphous phrase requiring analysis as it pertains to each individual situation. See Nurmi v. Vermont Employment Security Board, 124 Vt. 42, 47, 197 A.2d 483, 486 (1963). Burden is on the employee to satisfy the standard. Lanctot v. Department of Employment Security, 134 Vt. 281, 283, 356 A.2d 531, 533 (1976). Certainly the appellant would sustain the burden if he could prove that an implied employment contract embodying a promise of overtime work had modified the express hiring contract. Courts, however, are reluctant to find an im~ plied-in-fact contract modifying express terms of a contract. See Cass-Warner Corp. v. Brickman, 126 Vt. 329, 229 A.2d 309 (1967). Only when the assent of both parties is clear, Underhill v. Rutland, R.R., 90 Vt. 462, 475, 98 A. 1017, 1021 (1916), and all requirements of a contract have been met, Raymond v. Sheldon’s Estate, 92 Vt. 396, 397, 104 A. 106, 107 (1918), will a court find terms of an implied contract controlling where an express contract directly covers the subject matter. “The requirements of mutuality of intent and the lack of ambiguity in offer and acceptance are the same for an implied-in-fact contract as for an express contract; only the nature of the evidence differs.” Russell Corp. v. United Slates, 537 F.2d 474, 482 (Ct. Cl. 1976).
The appellant claims, in effect, that he was promised overtime work. “A promise is an expression of intention that the promisor will conduct himself in a specified way or bring about a specified result in the future, communicated in such manner to a promisee that he may justly expect performance and may reasonably rely thereon.” Cain v. Allen Electric & Equipment Co., 346 Mich. 568, 78 N.W.2d 296, 301 (1956) (quoting 1 Corbin on Contracts § 13). While the promise need not be expressed in words, Cushman v. Outwater, 121 Vt. 426, 159 A.2d 89 (1960), and it can be unilateral so that only one of the parties makes a promise, see Entis v. Atlantic Wire & Cable Corp., 335 F.2d 759 (2d Cir. 1964), the appellant has offered no evidence of the existence of duties owed in regard to overtime. We are without proof that the employer could force the employee to work overtime. The appellant has of*518fered no proof that he had a right to perform whatever overtime work was available. No agreement apparently existed beyond a promise of 45 hours work per week at a certain hourly wage. The mere possibility that the appellant would have faced reduced overtime hours therefore did not create a contract breach and consequently provide a good cause attributable to the employer sufficient to qualify for unemployment benefits pursuant to 21 V.S.A. § 1344(a) (2) (A).
The appellant also claims that he had a legitimate expectation of overtime work and that the new work schedule frustrated that expectation. It is true that an employee may expect certain employment conditions which are not necessarily subject to a legal claim, and that denial of such expectation satisfies the “good cause” requirement. Surowick v. Department of Employment Security, 133 Vt. 578, 349 A.2d 905 (1975) (aircraft mechanic who quit job because the heat, as an energy measure, was turned off in February in the hangar in which he worked, was not disqualified for unemployment compensation benefits). The Court read into the Surowick employment contract the right to have reasonable work conditions. For purposes of determining disqualification for unemployment compensation, a court looks to reasonableness, or what a reasonable person would expect in the same circumstances. Palucci v. Department of Employment Security, 135 Vt. 156, 159, 376 A.2d 14, 16 (1977). In the present case, the appellant is not being denied a reasonable condition of employment. A reasonable person could only expect the work schedule for which he bargained.
The situation also differs from cases where an employee was reduced from a full-time to a part-time worker, Gemmell v. Department of Employment Security, 135 Vt. 636, 377 A.2d 1326 (1977), or where an employer violated a contractual guarantee that an employee would receive overtime work, Tombigbee Lightweight Aggregate Corp. v. Roberts, 351 So. 2d 1388 (Ala. Civ. App. 1977). This case also differs from those cited by the appellant wherein an employer replaces an hourly wage rate with a lower pay scale. The employee here was guaranteed the terms of his written contract, and he is owed no more.
The appellant’s final claim is irrelevant to the issue at hand. He claims the Board’s decision relies on a finding of fact that *519he made no effort to discuss with his employer the reason for quitting. The logical result of appellant’s claim is that, no matter how absurd a grievance, merely voicing dissatisfaction to an employer lays the groundwork for “good cause” for quitting. Even if the Board’s finding on this point is without foundation, it is harmless error.